DSI (Display Serial Interface) driver implements MIPI DSI interface. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxx> --- drivers/video/omap2/dss/dsi.c | 3509 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 3509 insertions(+), 0 deletions(-) create mode 100644 drivers/video/omap2/dss/dsi.c diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c new file mode 100644 index 0000000..d43b9ce --- /dev/null +++ b/drivers/video/omap2/dss/dsi.c @@ -0,0 +1,3509 @@ +/* + * linux/drivers/video/omap2/dss/dsi.c + * + * Copyright (C) 2009 Nokia Corporation + * Author: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxx> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#define DSS_SUBSYS_NAME "DSI" + +#include <linux/kernel.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/mutex.h> +#include <linux/seq_file.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/kthread.h> +#include <linux/wait.h> + +#include <mach/board.h> +#include <mach/display.h> +#include <mach/clock.h> + +#include "dss.h" + +/*#define VERBOSE_IRQ*/ + +#define DSI_BASE 0x4804FC00 + +struct dsi_reg { u16 idx; }; + +#define DSI_REG(idx) ((const struct dsi_reg) { idx }) + +#define DSI_SZ_REGS SZ_1K +/* DSI Protocol Engine */ + +#define DSI_REVISION DSI_REG(0x0000) +#define DSI_SYSCONFIG DSI_REG(0x0010) +#define DSI_SYSSTATUS DSI_REG(0x0014) +#define DSI_IRQSTATUS DSI_REG(0x0018) +#define DSI_IRQENABLE DSI_REG(0x001C) +#define DSI_CTRL DSI_REG(0x0040) +#define DSI_COMPLEXIO_CFG1 DSI_REG(0x0048) +#define DSI_COMPLEXIO_IRQ_STATUS DSI_REG(0x004C) +#define DSI_COMPLEXIO_IRQ_ENABLE DSI_REG(0x0050) +#define DSI_CLK_CTRL DSI_REG(0x0054) +#define DSI_TIMING1 DSI_REG(0x0058) +#define DSI_TIMING2 DSI_REG(0x005C) +#define DSI_VM_TIMING1 DSI_REG(0x0060) +#define DSI_VM_TIMING2 DSI_REG(0x0064) +#define DSI_VM_TIMING3 DSI_REG(0x0068) +#define DSI_CLK_TIMING DSI_REG(0x006C) +#define DSI_TX_FIFO_VC_SIZE DSI_REG(0x0070) +#define DSI_RX_FIFO_VC_SIZE DSI_REG(0x0074) +#define DSI_COMPLEXIO_CFG2 DSI_REG(0x0078) +#define DSI_RX_FIFO_VC_FULLNESS DSI_REG(0x007C) +#define DSI_VM_TIMING4 DSI_REG(0x0080) +#define DSI_TX_FIFO_VC_EMPTINESS DSI_REG(0x0084) +#define DSI_VM_TIMING5 DSI_REG(0x0088) +#define DSI_VM_TIMING6 DSI_REG(0x008C) +#define DSI_VM_TIMING7 DSI_REG(0x0090) +#define DSI_STOPCLK_TIMING DSI_REG(0x0094) +#define DSI_VC_CTRL(n) DSI_REG(0x0100 + (n * 0x20)) +#define DSI_VC_TE(n) DSI_REG(0x0104 + (n * 0x20)) +#define DSI_VC_LONG_PACKET_HEADER(n) DSI_REG(0x0108 + (n * 0x20)) +#define DSI_VC_LONG_PACKET_PAYLOAD(n) DSI_REG(0x010C + (n * 0x20)) +#define DSI_VC_SHORT_PACKET_HEADER(n) DSI_REG(0x0110 + (n * 0x20)) +#define DSI_VC_IRQSTATUS(n) DSI_REG(0x0118 + (n * 0x20)) +#define DSI_VC_IRQENABLE(n) DSI_REG(0x011C + (n * 0x20)) + +/* DSIPHY_SCP */ + +#define DSI_DSIPHY_CFG0 DSI_REG(0x200 + 0x0000) +#define DSI_DSIPHY_CFG1 DSI_REG(0x200 + 0x0004) +#define DSI_DSIPHY_CFG2 DSI_REG(0x200 + 0x0008) +#define DSI_DSIPHY_CFG5 DSI_REG(0x200 + 0x0014) + +/* DSI_PLL_CTRL_SCP */ + +#define DSI_PLL_CONTROL DSI_REG(0x300 + 0x0000) +#define DSI_PLL_STATUS DSI_REG(0x300 + 0x0004) +#define DSI_PLL_GO DSI_REG(0x300 + 0x0008) +#define DSI_PLL_CONFIGURATION1 DSI_REG(0x300 + 0x000C) +#define DSI_PLL_CONFIGURATION2 DSI_REG(0x300 + 0x0010) + +#define REG_GET(idx, start, end) \ + FLD_GET(dsi_read_reg(idx), start, end) + +#define REG_FLD_MOD(idx, val, start, end) \ + dsi_write_reg(idx, FLD_MOD(dsi_read_reg(idx), val, start, end)) + +/* Global interrupts */ +#define DSI_IRQ_VC0 (1 << 0) +#define DSI_IRQ_VC1 (1 << 1) +#define DSI_IRQ_VC2 (1 << 2) +#define DSI_IRQ_VC3 (1 << 3) +#define DSI_IRQ_WAKEUP (1 << 4) +#define DSI_IRQ_RESYNC (1 << 5) +#define DSI_IRQ_PLL_LOCK (1 << 7) +#define DSI_IRQ_PLL_UNLOCK (1 << 8) +#define DSI_IRQ_PLL_RECALL (1 << 9) +#define DSI_IRQ_COMPLEXIO_ERR (1 << 10) +#define DSI_IRQ_HS_TX_TIMEOUT (1 << 14) +#define DSI_IRQ_LP_RX_TIMEOUT (1 << 15) +#define DSI_IRQ_TE_TRIGGER (1 << 16) +#define DSI_IRQ_ACK_TRIGGER (1 << 17) +#define DSI_IRQ_SYNC_LOST (1 << 18) +#define DSI_IRQ_LDO_POWER_GOOD (1 << 19) +#define DSI_IRQ_TA_TIMEOUT (1 << 20) +#define DSI_IRQ_ERROR_MASK \ + (DSI_IRQ_HS_TX_TIMEOUT | DSI_IRQ_LP_RX_TIMEOUT | DSI_IRQ_SYNC_LOST | \ + DSI_IRQ_TA_TIMEOUT) +#define DSI_IRQ_CHANNEL_MASK 0xf + +/* Virtual channel interrupts */ +#define DSI_VC_IRQ_CS (1 << 0) +#define DSI_VC_IRQ_ECC_CORR (1 << 1) +#define DSI_VC_IRQ_PACKET_SENT (1 << 2) +#define DSI_VC_IRQ_FIFO_TX_OVF (1 << 3) +#define DSI_VC_IRQ_FIFO_RX_OVF (1 << 4) +#define DSI_VC_IRQ_BTA (1 << 5) +#define DSI_VC_IRQ_ECC_NO_CORR (1 << 6) +#define DSI_VC_IRQ_FIFO_TX_UDF (1 << 7) +#define DSI_VC_IRQ_PP_BUSY_CHANGE (1 << 8) +#define DSI_VC_IRQ_ERROR_MASK \ + (DSI_VC_IRQ_CS | DSI_VC_IRQ_ECC_CORR | DSI_VC_IRQ_FIFO_TX_OVF | \ + DSI_VC_IRQ_FIFO_RX_OVF | DSI_VC_IRQ_ECC_NO_CORR | \ + DSI_VC_IRQ_FIFO_TX_UDF) + +/* ComplexIO interrupts */ +#define DSI_CIO_IRQ_ERRSYNCESC1 (1 << 0) +#define DSI_CIO_IRQ_ERRSYNCESC2 (1 << 1) +#define DSI_CIO_IRQ_ERRSYNCESC3 (1 << 2) +#define DSI_CIO_IRQ_ERRESC1 (1 << 5) +#define DSI_CIO_IRQ_ERRESC2 (1 << 6) +#define DSI_CIO_IRQ_ERRESC3 (1 << 7) +#define DSI_CIO_IRQ_ERRCONTROL1 (1 << 10) +#define DSI_CIO_IRQ_ERRCONTROL2 (1 << 11) +#define DSI_CIO_IRQ_ERRCONTROL3 (1 << 12) +#define DSI_CIO_IRQ_STATEULPS1 (1 << 15) +#define DSI_CIO_IRQ_STATEULPS2 (1 << 16) +#define DSI_CIO_IRQ_STATEULPS3 (1 << 17) +#define DSI_CIO_IRQ_ERRCONTENTIONLP0_1 (1 << 20) +#define DSI_CIO_IRQ_ERRCONTENTIONLP1_1 (1 << 21) +#define DSI_CIO_IRQ_ERRCONTENTIONLP0_2 (1 << 22) +#define DSI_CIO_IRQ_ERRCONTENTIONLP1_2 (1 << 23) +#define DSI_CIO_IRQ_ERRCONTENTIONLP0_3 (1 << 24) +#define DSI_CIO_IRQ_ERRCONTENTIONLP1_3 (1 << 25) +#define DSI_CIO_IRQ_ULPSACTIVENOT_ALL0 (1 << 30) +#define DSI_CIO_IRQ_ULPSACTIVENOT_ALL1 (1 << 31) + +#define DSI_DT_DCS_SHORT_WRITE_0 0x05 +#define DSI_DT_DCS_SHORT_WRITE_1 0x15 +#define DSI_DT_DCS_READ 0x06 +#define DSI_DT_SET_MAX_RET_PKG_SIZE 0x37 +#define DSI_DT_NULL_PACKET 0x09 +#define DSI_DT_DCS_LONG_WRITE 0x39 + +#define DSI_DT_RX_ACK_WITH_ERR 0x02 +#define DSI_DT_RX_DCS_LONG_READ 0x1c +#define DSI_DT_RX_SHORT_READ_1 0x21 +#define DSI_DT_RX_SHORT_READ_2 0x22 + +#define FINT_MAX 2100000 +#define FINT_MIN 750000 +#define REGN_MAX (1 << 7) +#define REGM_MAX ((1 << 11) - 1) +#define REGM3_MAX (1 << 4) +#define REGM4_MAX (1 << 4) + +enum fifo_size { + DSI_FIFO_SIZE_0 = 0, + DSI_FIFO_SIZE_32 = 1, + DSI_FIFO_SIZE_64 = 2, + DSI_FIFO_SIZE_96 = 3, + DSI_FIFO_SIZE_128 = 4, +}; + +enum dsi_vc_mode { + DSI_VC_MODE_L4 = 0, + DSI_VC_MODE_VP, +}; + +struct dsi_update_region { + bool dirty; + u16 x, y, w, h; + struct omap_dss_device *device; +}; + +static struct +{ + void __iomem *base; + + unsigned long dsi1_pll_fclk; /* Hz */ + unsigned long dsi2_pll_fclk; /* Hz */ + unsigned long dsiphy; /* Hz */ + unsigned long ddr_clk; /* Hz */ + + struct regulator *vdds_dsi_reg; + + struct { + enum dsi_vc_mode mode; + struct omap_dss_device *dssdev; + enum fifo_size fifo_size; + int dest_per; /* destination peripheral 0-3 */ + } vc[4]; + + struct mutex lock; + struct mutex bus_lock; + + unsigned pll_locked; + + struct completion bta_completion; + + struct task_struct *thread; + wait_queue_head_t waitqueue; + + spinlock_t update_lock; + bool framedone_received; + struct dsi_update_region update_region; + struct dsi_update_region active_update_region; + struct completion update_completion; + + enum omap_dss_update_mode user_update_mode; + enum omap_dss_update_mode update_mode; + bool te_enabled; + bool use_ext_te; + + unsigned long cache_req_pck; + unsigned long cache_clk_freq; + struct dsi_clock_info cache_cinfo; + + u32 errors; + spinlock_t errors_lock; +#ifdef DEBUG + ktime_t perf_setup_time; + ktime_t perf_start_time; + ktime_t perf_start_time_auto; + int perf_measure_frames; +#endif + int debug_read; + int debug_write; +} dsi; + +#ifdef DEBUG +static unsigned int dsi_perf; +module_param_named(dsi_perf, dsi_perf, bool, 0644); +#endif + +static inline void dsi_write_reg(const struct dsi_reg idx, u32 val) +{ + __raw_writel(val, dsi.base + idx.idx); +} + +static inline u32 dsi_read_reg(const struct dsi_reg idx) +{ + return __raw_readl(dsi.base + idx.idx); +} + + +void dsi_save_context(void) +{ +} + +void dsi_restore_context(void) +{ +} + +void dsi_bus_lock(void) +{ + mutex_lock(&dsi.bus_lock); +} +EXPORT_SYMBOL(dsi_bus_lock); + +void dsi_bus_unlock(void) +{ + mutex_unlock(&dsi.bus_lock); +} +EXPORT_SYMBOL(dsi_bus_unlock); + +static inline int wait_for_bit_change(const struct dsi_reg idx, int bitnum, + int value) +{ + int t = 100000; + + while (REG_GET(idx, bitnum, bitnum) != value) { + if (--t == 0) + return !value; + } + + return value; +} + +#ifdef DEBUG +static void dsi_perf_mark_setup(void) +{ + dsi.perf_setup_time = ktime_get(); +} + +static void dsi_perf_mark_start(void) +{ + dsi.perf_start_time = ktime_get(); +} + +static void dsi_perf_mark_start_auto(void) +{ + dsi.perf_measure_frames = 0; + dsi.perf_start_time_auto = ktime_get(); +} + +static void dsi_perf_show(const char *name) +{ + ktime_t t, setup_time, trans_time; + u32 total_bytes; + u32 setup_us, trans_us, total_us; + + if (!dsi_perf) + return; + + if (dsi.update_mode == OMAP_DSS_UPDATE_DISABLED) + return; + + t = ktime_get(); + + setup_time = ktime_sub(dsi.perf_start_time, dsi.perf_setup_time); + setup_us = (u32)ktime_to_us(setup_time); + if (setup_us == 0) + setup_us = 1; + + trans_time = ktime_sub(t, dsi.perf_start_time); + trans_us = (u32)ktime_to_us(trans_time); + if (trans_us == 0) + trans_us = 1; + + total_us = setup_us + trans_us; + + total_bytes = dsi.active_update_region.w * + dsi.active_update_region.h * + dsi.active_update_region.device->ctrl.pixel_size / 8; + + if (dsi.update_mode == OMAP_DSS_UPDATE_AUTO) { + static u32 s_total_trans_us, s_total_setup_us; + static u32 s_min_trans_us = 0xffffffff, s_min_setup_us; + static u32 s_max_trans_us, s_max_setup_us; + const int numframes = 100; + ktime_t total_time_auto; + u32 total_time_auto_us; + + dsi.perf_measure_frames++; + + if (setup_us < s_min_setup_us) + s_min_setup_us = setup_us; + + if (setup_us > s_max_setup_us) + s_max_setup_us = setup_us; + + s_total_setup_us += setup_us; + + if (trans_us < s_min_trans_us) + s_min_trans_us = trans_us; + + if (trans_us > s_max_trans_us) + s_max_trans_us = trans_us; + + s_total_trans_us += trans_us; + + if (dsi.perf_measure_frames < numframes) + return; + + total_time_auto = ktime_sub(t, dsi.perf_start_time_auto); + total_time_auto_us = (u32)ktime_to_us(total_time_auto); + + printk(KERN_INFO "DSI(%s): %u fps, setup %u/%u/%u, " + "trans %u/%u/%u\n", + name, + 1000 * 1000 * numframes / total_time_auto_us, + s_min_setup_us, + s_max_setup_us, + s_total_setup_us / numframes, + s_min_trans_us, + s_max_trans_us, + s_total_trans_us / numframes); + + s_total_setup_us = 0; + s_min_setup_us = 0xffffffff; + s_max_setup_us = 0; + s_total_trans_us = 0; + s_min_trans_us = 0xffffffff; + s_max_trans_us = 0; + dsi_perf_mark_start_auto(); + } else { + printk(KERN_INFO "DSI(%s): %u us + %u us = %u us (%uHz), " + "%u bytes, %u kbytes/sec\n", + name, + setup_us, + trans_us, + total_us, + 1000*1000 / total_us, + total_bytes, + total_bytes * 1000 / total_us); + } +} +#else +#define dsi_perf_mark_setup() +#define dsi_perf_mark_start() +#define dsi_perf_mark_start_auto() +#define dsi_perf_show(x) +#endif + +static void print_irq_status(u32 status) +{ +#ifndef VERBOSE_IRQ + if ((status & ~DSI_IRQ_CHANNEL_MASK) == 0) + return; +#endif + printk(KERN_DEBUG "DSI IRQ: 0x%x: ", status); + +#define PIS(x) \ + if (status & DSI_IRQ_##x) \ + printk(#x " "); +#ifdef VERBOSE_IRQ + PIS(VC0); + PIS(VC1); + PIS(VC2); + PIS(VC3); +#endif + PIS(WAKEUP); + PIS(RESYNC); + PIS(PLL_LOCK); + PIS(PLL_UNLOCK); + PIS(PLL_RECALL); + PIS(COMPLEXIO_ERR); + PIS(HS_TX_TIMEOUT); + PIS(LP_RX_TIMEOUT); + PIS(TE_TRIGGER); + PIS(ACK_TRIGGER); + PIS(SYNC_LOST); + PIS(LDO_POWER_GOOD); + PIS(TA_TIMEOUT); +#undef PIS + + printk("\n"); +} + +static void print_irq_status_vc(int channel, u32 status) +{ +#ifndef VERBOSE_IRQ + if ((status & ~DSI_VC_IRQ_PACKET_SENT) == 0) + return; +#endif + printk(KERN_DEBUG "DSI VC(%d) IRQ 0x%x: ", channel, status); + +#define PIS(x) \ + if (status & DSI_VC_IRQ_##x) \ + printk(#x " "); + PIS(CS); + PIS(ECC_CORR); +#ifdef VERBOSE_IRQ + PIS(PACKET_SENT); +#endif + PIS(FIFO_TX_OVF); + PIS(FIFO_RX_OVF); + PIS(BTA); + PIS(ECC_NO_CORR); + PIS(FIFO_TX_UDF); + PIS(PP_BUSY_CHANGE); +#undef PIS + printk("\n"); +} + +static void print_irq_status_cio(u32 status) +{ + printk(KERN_DEBUG "DSI CIO IRQ 0x%x: ", status); + +#define PIS(x) \ + if (status & DSI_CIO_IRQ_##x) \ + printk(#x " "); + PIS(ERRSYNCESC1); + PIS(ERRSYNCESC2); + PIS(ERRSYNCESC3); + PIS(ERRESC1); + PIS(ERRESC2); + PIS(ERRESC3); + PIS(ERRCONTROL1); + PIS(ERRCONTROL2); + PIS(ERRCONTROL3); + PIS(STATEULPS1); + PIS(STATEULPS2); + PIS(STATEULPS3); + PIS(ERRCONTENTIONLP0_1); + PIS(ERRCONTENTIONLP1_1); + PIS(ERRCONTENTIONLP0_2); + PIS(ERRCONTENTIONLP1_2); + PIS(ERRCONTENTIONLP0_3); + PIS(ERRCONTENTIONLP1_3); + PIS(ULPSACTIVENOT_ALL0); + PIS(ULPSACTIVENOT_ALL1); +#undef PIS + + printk("\n"); +} + +static int debug_irq; + +/* called from dss */ +void dsi_irq_handler(void) +{ + u32 irqstatus, vcstatus, ciostatus; + int i; + + irqstatus = dsi_read_reg(DSI_IRQSTATUS); + + if (irqstatus & DSI_IRQ_ERROR_MASK) { + DSSERR("DSI error, irqstatus %x\n", irqstatus); + print_irq_status(irqstatus); + spin_lock(&dsi.errors_lock); + dsi.errors |= irqstatus & DSI_IRQ_ERROR_MASK; + spin_unlock(&dsi.errors_lock); + } else if (debug_irq) { + print_irq_status(irqstatus); + } + + for (i = 0; i < 4; ++i) { + if ((irqstatus & (1<<i)) == 0) + continue; + + vcstatus = dsi_read_reg(DSI_VC_IRQSTATUS(i)); + + if (vcstatus & DSI_VC_IRQ_BTA) + complete(&dsi.bta_completion); + + if (vcstatus & DSI_VC_IRQ_ERROR_MASK) { + DSSERR("DSI VC(%d) error, vc irqstatus %x\n", + i, vcstatus); + print_irq_status_vc(i, vcstatus); + } else if (debug_irq) { + print_irq_status_vc(i, vcstatus); + } + + dsi_write_reg(DSI_VC_IRQSTATUS(i), vcstatus); + } + + if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) { + ciostatus = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS); + + dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, ciostatus); + + DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus); + print_irq_status_cio(ciostatus); + } + + dsi_write_reg(DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK); +} + + +static void _dsi_initialize_irq(void) +{ + u32 l; + int i; + + /* disable all interrupts */ + dsi_write_reg(DSI_IRQENABLE, 0); + for (i = 0; i < 4; ++i) + dsi_write_reg(DSI_VC_IRQENABLE(i), 0); + dsi_write_reg(DSI_COMPLEXIO_IRQ_ENABLE, 0); + + /* clear interrupt status */ + l = dsi_read_reg(DSI_IRQSTATUS); + dsi_write_reg(DSI_IRQSTATUS, l & ~DSI_IRQ_CHANNEL_MASK); + + for (i = 0; i < 4; ++i) { + l = dsi_read_reg(DSI_VC_IRQSTATUS(i)); + dsi_write_reg(DSI_VC_IRQSTATUS(i), l); + } + + l = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS); + dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, l); + + /* enable error irqs */ + l = DSI_IRQ_ERROR_MASK; + dsi_write_reg(DSI_IRQENABLE, l); + + l = DSI_VC_IRQ_ERROR_MASK; + for (i = 0; i < 4; ++i) + dsi_write_reg(DSI_VC_IRQENABLE(i), l); + + /* XXX zonda responds incorrectly, causing control error: + Exit from LP-ESC mode to LP11 uses wrong transition states on the + data lines LP0 and LN0. */ + dsi_write_reg(DSI_COMPLEXIO_IRQ_ENABLE, + -1 & (~DSI_CIO_IRQ_ERRCONTROL2)); +} + +static u32 dsi_get_errors(void) +{ + unsigned long flags; + u32 e; + spin_lock_irqsave(&dsi.errors_lock, flags); + e = dsi.errors; + dsi.errors = 0; + spin_unlock_irqrestore(&dsi.errors_lock, flags); + return e; +} + +static void dsi_vc_enable_bta_irq(int channel) +{ + u32 l; + + dsi_write_reg(DSI_VC_IRQSTATUS(channel), DSI_VC_IRQ_BTA); + + l = dsi_read_reg(DSI_VC_IRQENABLE(channel)); + l |= DSI_VC_IRQ_BTA; + dsi_write_reg(DSI_VC_IRQENABLE(channel), l); +} + +static void dsi_vc_disable_bta_irq(int channel) +{ + u32 l; + + l = dsi_read_reg(DSI_VC_IRQENABLE(channel)); + l &= ~DSI_VC_IRQ_BTA; + dsi_write_reg(DSI_VC_IRQENABLE(channel), l); +} + +/* DSI func clock. this could also be DSI2_PLL_FCLK */ +static inline void enable_clocks(bool enable) +{ + if (enable) + dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1); + else + dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1); +} + +/* source clock for DSI PLL. this could also be PCLKFREE */ +static inline void dsi_enable_pll_clock(bool enable) +{ + if (enable) + dss_clk_enable(DSS_CLK_FCK2); + else + dss_clk_disable(DSS_CLK_FCK2); + + if (enable && dsi.pll_locked) { + if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1) + DSSERR("cannot lock PLL when enabling clocks\n"); + } +} + +#ifdef DEBUG +static void _dsi_print_reset_status(void) +{ + u32 l; + + if (!dss_debug) + return; + + /* A dummy read using the SCP interface to any DSIPHY register is + * required after DSIPHY reset to complete the reset of the DSI complex + * I/O. */ + l = dsi_read_reg(DSI_DSIPHY_CFG5); + + printk(KERN_DEBUG "DSI resets: "); + + l = dsi_read_reg(DSI_PLL_STATUS); + printk("PLL (%d) ", FLD_GET(l, 0, 0)); + + l = dsi_read_reg(DSI_COMPLEXIO_CFG1); + printk("CIO (%d) ", FLD_GET(l, 29, 29)); + + l = dsi_read_reg(DSI_DSIPHY_CFG5); + printk("PHY (%x, %d, %d, %d)\n", + FLD_GET(l, 28, 26), + FLD_GET(l, 29, 29), + FLD_GET(l, 30, 30), + FLD_GET(l, 31, 31)); +} +#else +#define _dsi_print_reset_status() +#endif + +static inline int dsi_if_enable(bool enable) +{ + DSSDBG("dsi_if_enable(%d)\n", enable); + + enable = enable ? 1 : 0; + REG_FLD_MOD(DSI_CTRL, enable, 0, 0); /* IF_EN */ + + if (wait_for_bit_change(DSI_CTRL, 0, enable) != enable) { + DSSERR("Failed to set dsi_if_enable to %d\n", enable); + return -EIO; + } + + return 0; +} + +static unsigned long dsi_fclk_rate(void) +{ + unsigned long r; + + if (dss_get_dsi_clk_source() == 0) { + /* DSI FCLK source is DSS1_ALWON_FCK, which is dss1_fck */ + r = dss_clk_get_rate(DSS_CLK_FCK1); + } else { + /* DSI FCLK source is DSI2_PLL_FCLK */ + r = dsi.dsi2_pll_fclk; + } + + return r; +} + +static int dsi_set_lp_clk_divisor(struct omap_dss_device *dssdev) +{ + unsigned n; + unsigned long dsi_fclk; + unsigned long lp_clk, lp_clk_req; + + dsi_fclk = dsi_fclk_rate(); + + lp_clk_req = dssdev->phy.dsi.lp_clk_hz; + + for (n = 1; n < (1 << 13) - 1; ++n) { + lp_clk = dsi_fclk / 2 / n; + if (lp_clk <= lp_clk_req) + break; + } + + if (n == (1 << 13) - 1) { + DSSERR("Failed to find LP_CLK_DIVISOR\n"); + return -EINVAL; + } + + DSSDBG("LP_CLK_DIV %u, LP_CLK %lu (req %lu)\n", n, lp_clk, lp_clk_req); + + REG_FLD_MOD(DSI_CLK_CTRL, n, 12, 0); /* LP_CLK_DIVISOR */ + if (dsi_fclk > 30*1000*1000) + REG_FLD_MOD(DSI_CLK_CTRL, 1, 21, 21); /* LP_RX_SYNCHRO_ENABLE */ + + return 0; +} + + +enum dsi_pll_power_state { + DSI_PLL_POWER_OFF = 0x0, + DSI_PLL_POWER_ON_HSCLK = 0x1, + DSI_PLL_POWER_ON_ALL = 0x2, + DSI_PLL_POWER_ON_DIV = 0x3, +}; + +static int dsi_pll_power(enum dsi_pll_power_state state) +{ + int t = 0; + + REG_FLD_MOD(DSI_CLK_CTRL, state, 31, 30); /* PLL_PWR_CMD */ + + /* PLL_PWR_STATUS */ + while (FLD_GET(dsi_read_reg(DSI_CLK_CTRL), 29, 28) != state) { + udelay(1); + if (t++ > 1000) { + DSSERR("Failed to set DSI PLL power mode to %d\n", + state); + return -ENODEV; + } + } + + return 0; +} + +int dsi_pll_calc_pck(bool is_tft, unsigned long req_pck, + struct dsi_clock_info *cinfo) +{ + struct dsi_clock_info cur, best; + int min_fck_per_pck; + int match = 0; + unsigned long dss_clk_fck2; + + dss_clk_fck2 = dss_clk_get_rate(DSS_CLK_FCK2); + + if (req_pck == dsi.cache_req_pck && + dsi.cache_cinfo.clkin == dss_clk_fck2) { + DSSDBG("DSI clock info found from cache\n"); + *cinfo = dsi.cache_cinfo; + return 0; + } + + min_fck_per_pck = CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK; + + if (min_fck_per_pck && + req_pck * min_fck_per_pck > DISPC_MAX_FCK) { + DSSERR("Requested pixel clock not possible with the current " + "OMAP2_DSS_MIN_FCK_PER_PCK setting. Turning " + "the constraint off.\n"); + min_fck_per_pck = 0; + } + + DSSDBG("dsi_pll_calc\n"); + +retry: + memset(&best, 0, sizeof(best)); + + memset(&cur, 0, sizeof(cur)); + cur.clkin = dss_clk_fck2; + cur.use_dss2_fck = 1; + cur.highfreq = 0; + + /* no highfreq: 0.75MHz < Fint = clkin / regn < 2.1MHz */ + /* highfreq: 0.75MHz < Fint = clkin / (2*regn) < 2.1MHz */ + /* To reduce PLL lock time, keep Fint high (around 2 MHz) */ + for (cur.regn = 1; cur.regn < REGN_MAX; ++cur.regn) { + if (cur.highfreq == 0) + cur.fint = cur.clkin / cur.regn; + else + cur.fint = cur.clkin / (2 * cur.regn); + + if (cur.fint > FINT_MAX || cur.fint < FINT_MIN) + continue; + + /* DSIPHY(MHz) = (2 * regm / regn) * (clkin / (highfreq + 1)) */ + for (cur.regm = 1; cur.regm < REGM_MAX; ++cur.regm) { + unsigned long a, b; + + a = 2 * cur.regm * (cur.clkin/1000); + b = cur.regn * (cur.highfreq + 1); + cur.dsiphy = a / b * 1000; + + if (cur.dsiphy > 1800 * 1000 * 1000) + break; + + /* DSI1_PLL_FCLK(MHz) = DSIPHY(MHz) / regm3 < 173MHz */ + for (cur.regm3 = 1; cur.regm3 < REGM3_MAX; + ++cur.regm3) { + cur.dsi1_pll_fclk = cur.dsiphy / cur.regm3; + + /* this will narrow down the search a bit, + * but still give pixclocks below what was + * requested */ + if (cur.dsi1_pll_fclk < req_pck) + break; + + if (cur.dsi1_pll_fclk > DISPC_MAX_FCK) + continue; + + if (min_fck_per_pck && + cur.dsi1_pll_fclk < + req_pck * min_fck_per_pck) + continue; + + match = 1; + + find_lck_pck_divs(is_tft, req_pck, + cur.dsi1_pll_fclk, + &cur.lck_div, + &cur.pck_div); + + cur.lck = cur.dsi1_pll_fclk / cur.lck_div; + cur.pck = cur.lck / cur.pck_div; + + if (abs(cur.pck - req_pck) < + abs(best.pck - req_pck)) { + best = cur; + + if (cur.pck == req_pck) + goto found; + } + } + } + } +found: + if (!match) { + if (min_fck_per_pck) { + DSSERR("Could not find suitable clock settings.\n" + "Turning FCK/PCK constraint off and" + "trying again.\n"); + min_fck_per_pck = 0; + goto retry; + } + + DSSERR("Could not find suitable clock settings.\n"); + + return -EINVAL; + } + + /* DSI2_PLL_FCLK (regm4) is not used. Set it to something sane. */ + best.regm4 = best.dsiphy / 48000000; + if (best.regm4 > REGM4_MAX) + best.regm4 = REGM4_MAX; + else if (best.regm4 == 0) + best.regm4 = 1; + best.dsi2_pll_fclk = best.dsiphy / best.regm4; + + if (cinfo) + *cinfo = best; + + dsi.cache_req_pck = req_pck; + dsi.cache_clk_freq = 0; + dsi.cache_cinfo = best; + + return 0; +} + +static int dsi_pll_calc_ddrfreq(unsigned long clk_freq, + struct dsi_clock_info *cinfo) +{ + struct dsi_clock_info cur, best; + const bool use_dss2_fck = 1; + unsigned long datafreq; + unsigned long dss_clk_fck2; + + DSSDBG("dsi_pll_calc_ddrfreq\n"); + + dss_clk_fck2 = dss_clk_get_rate(DSS_CLK_FCK2); + + if (clk_freq == dsi.cache_clk_freq && + dsi.cache_cinfo.clkin == dss_clk_fck2) { + DSSDBG("DSI clock info found from cache\n"); + *cinfo = dsi.cache_cinfo; + return 0; + } + + datafreq = clk_freq * 4; + + memset(&best, 0, sizeof(best)); + + memset(&cur, 0, sizeof(cur)); + cur.use_dss2_fck = use_dss2_fck; + if (use_dss2_fck) { + cur.clkin = dss_clk_fck2; + cur.highfreq = 0; + } else { + cur.clkin = dispc_pclk_rate(); + if (cur.clkin < 32000000) + cur.highfreq = 0; + else + cur.highfreq = 1; + } + + /* no highfreq: 0.75MHz < Fint = clkin / regn < 2.1MHz */ + /* highfreq: 0.75MHz < Fint = clkin / (2*regn) < 2.1MHz */ + /* To reduce PLL lock time, keep Fint high (around 2 MHz) */ + for (cur.regn = 1; cur.regn < REGN_MAX; ++cur.regn) { + if (cur.highfreq == 0) + cur.fint = cur.clkin / cur.regn; + else + cur.fint = cur.clkin / (2 * cur.regn); + + if (cur.fint > FINT_MAX || cur.fint < FINT_MIN) + continue; + + /* DSIPHY(MHz) = (2 * regm / regn) * (clkin / (highfreq + 1)) */ + for (cur.regm = 1; cur.regm < REGM_MAX; ++cur.regm) { + unsigned long a, b; + + a = 2 * cur.regm * (cur.clkin/1000); + b = cur.regn * (cur.highfreq + 1); + cur.dsiphy = a / b * 1000; + + if (cur.dsiphy > 1800 * 1000 * 1000) + break; + + if (abs(cur.dsiphy - datafreq) < + abs(best.dsiphy - datafreq)) { + best = cur; + /* DSSDBG("best %ld\n", best.dsiphy); */ + } + + if (cur.dsiphy == datafreq) + goto found; + } + } +found: + /* DSI1_PLL_FCLK (regm3) is not used. Set it to something sane. */ + best.regm3 = best.dsiphy / 48000000; + if (best.regm3 > REGM3_MAX) + best.regm3 = REGM3_MAX; + else if (best.regm3 == 0) + best.regm3 = 1; + best.dsi1_pll_fclk = best.dsiphy / best.regm3; + + /* DSI2_PLL_FCLK (regm4) is not used. Set it to something sane. */ + best.regm4 = best.dsiphy / 48000000; + if (best.regm4 > REGM4_MAX) + best.regm4 = REGM4_MAX; + else if (best.regm4 == 0) + best.regm4 = 1; + best.dsi2_pll_fclk = best.dsiphy / best.regm4; + + if (cinfo) + *cinfo = best; + + dsi.cache_clk_freq = clk_freq; + dsi.cache_req_pck = 0; + dsi.cache_cinfo = best; + + return 0; +} + +int dsi_pll_program(struct dsi_clock_info *cinfo) +{ + int r = 0; + u32 l; + + DSSDBG("dsi_pll_program\n"); + + dsi.dsiphy = cinfo->dsiphy; + dsi.ddr_clk = dsi.dsiphy / 4; + dsi.dsi1_pll_fclk = cinfo->dsi1_pll_fclk; + dsi.dsi2_pll_fclk = cinfo->dsi2_pll_fclk; + + DSSDBG("DSI Fint %ld\n", cinfo->fint); + + DSSDBG("clkin (%s) rate %ld, highfreq %d\n", + cinfo->use_dss2_fck ? "dss2_fck" : "pclkfree", + cinfo->clkin, + cinfo->highfreq); + + /* DSIPHY == CLKIN4DDR */ + DSSDBG("DSIPHY = 2 * %d / %d * %lu / %d = %lu\n", + cinfo->regm, + cinfo->regn, + cinfo->clkin, + cinfo->highfreq + 1, + cinfo->dsiphy); + + DSSDBG("Data rate on 1 DSI lane %ld Mbps\n", + dsi.dsiphy / 1000 / 1000 / 2); + + DSSDBG("Clock lane freq %ld Hz\n", dsi.ddr_clk); + + DSSDBG("regm3 = %d, dsi1_pll_fclk = %lu\n", + cinfo->regm3, cinfo->dsi1_pll_fclk); + DSSDBG("regm4 = %d, dsi2_pll_fclk = %lu\n", + cinfo->regm4, cinfo->dsi2_pll_fclk); + + REG_FLD_MOD(DSI_PLL_CONTROL, 0, 0, 0); /* DSI_PLL_AUTOMODE = manual */ + + l = dsi_read_reg(DSI_PLL_CONFIGURATION1); + l = FLD_MOD(l, 1, 0, 0); /* DSI_PLL_STOPMODE */ + l = FLD_MOD(l, cinfo->regn - 1, 7, 1); /* DSI_PLL_REGN */ + l = FLD_MOD(l, cinfo->regm, 18, 8); /* DSI_PLL_REGM */ + l = FLD_MOD(l, cinfo->regm3 - 1, 22, 19); /* DSI_CLOCK_DIV */ + l = FLD_MOD(l, cinfo->regm4 - 1, 26, 23); /* DSIPROTO_CLOCK_DIV */ + dsi_write_reg(DSI_PLL_CONFIGURATION1, l); + + l = dsi_read_reg(DSI_PLL_CONFIGURATION2); + l = FLD_MOD(l, 7, 4, 1); /* DSI_PLL_FREQSEL */ + /* DSI_PLL_CLKSEL */ + l = FLD_MOD(l, cinfo->use_dss2_fck ? 0 : 1, 11, 11); + l = FLD_MOD(l, cinfo->highfreq, 12, 12); /* DSI_PLL_HIGHFREQ */ + l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */ + l = FLD_MOD(l, 0, 14, 14); /* DSIPHY_CLKINEN */ + l = FLD_MOD(l, 1, 20, 20); /* DSI_HSDIVBYPASS */ + dsi_write_reg(DSI_PLL_CONFIGURATION2, l); + + REG_FLD_MOD(DSI_PLL_GO, 1, 0, 0); /* DSI_PLL_GO */ + + if (wait_for_bit_change(DSI_PLL_GO, 0, 0) != 0) { + DSSERR("dsi pll go bit not going down.\n"); + r = -EIO; + goto err; + } + + if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1) { + DSSERR("cannot lock PLL\n"); + r = -EIO; + goto err; + } + + dsi.pll_locked = 1; + + l = dsi_read_reg(DSI_PLL_CONFIGURATION2); + l = FLD_MOD(l, 0, 0, 0); /* DSI_PLL_IDLE */ + l = FLD_MOD(l, 0, 5, 5); /* DSI_PLL_PLLLPMODE */ + l = FLD_MOD(l, 0, 6, 6); /* DSI_PLL_LOWCURRSTBY */ + l = FLD_MOD(l, 0, 7, 7); /* DSI_PLL_TIGHTPHASELOCK */ + l = FLD_MOD(l, 0, 8, 8); /* DSI_PLL_DRIFTGUARDEN */ + l = FLD_MOD(l, 0, 10, 9); /* DSI_PLL_LOCKSEL */ + l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */ + l = FLD_MOD(l, 1, 14, 14); /* DSIPHY_CLKINEN */ + l = FLD_MOD(l, 0, 15, 15); /* DSI_BYPASSEN */ + l = FLD_MOD(l, 1, 16, 16); /* DSS_CLOCK_EN */ + l = FLD_MOD(l, 0, 17, 17); /* DSS_CLOCK_PWDN */ + l = FLD_MOD(l, 1, 18, 18); /* DSI_PROTO_CLOCK_EN */ + l = FLD_MOD(l, 0, 19, 19); /* DSI_PROTO_CLOCK_PWDN */ + l = FLD_MOD(l, 0, 20, 20); /* DSI_HSDIVBYPASS */ + dsi_write_reg(DSI_PLL_CONFIGURATION2, l); + + DSSDBG("PLL config done\n"); +err: + return r; +} + +int dsi_pll_init(bool enable_hsclk, bool enable_hsdiv) +{ + int r = 0; + enum dsi_pll_power_state pwstate; + struct dispc_clock_info cinfo; + + DSSDBG("PLL init\n"); + + enable_clocks(1); + dsi_enable_pll_clock(1); + + /* XXX this should be calculated depending on the screen size, + * required framerate and DSI speed. + * For now 48MHz is enough for 864x480@60 with 360Mbps/lane + * with two lanes */ + r = dispc_calc_clock_div(1, 48 * 1000 * 1000, &cinfo); + if (r) + goto err0; + + r = dispc_set_clock_div(&cinfo); + if (r) { + DSSERR("Failed to set basic clocks\n"); + goto err0; + } + + r = regulator_enable(dsi.vdds_dsi_reg); + if (r) + goto err0; + + /* XXX PLL does not come out of reset without this... */ + dispc_pck_free_enable(1); + + if (wait_for_bit_change(DSI_PLL_STATUS, 0, 1) != 1) { + DSSERR("PLL not coming out of reset.\n"); + r = -ENODEV; + goto err1; + } + + /* XXX ... but if left on, we get problems when planes do not + * fill the whole display. No idea about this */ + dispc_pck_free_enable(0); + + if (enable_hsclk && enable_hsdiv) + pwstate = DSI_PLL_POWER_ON_ALL; + else if (enable_hsclk) + pwstate = DSI_PLL_POWER_ON_HSCLK; + else if (enable_hsdiv) + pwstate = DSI_PLL_POWER_ON_DIV; + else + pwstate = DSI_PLL_POWER_OFF; + + r = dsi_pll_power(pwstate); + + if (r) + goto err1; + + DSSDBG("PLL init done\n"); + + return 0; +err1: + regulator_disable(dsi.vdds_dsi_reg); +err0: + enable_clocks(0); + dsi_enable_pll_clock(0); + return r; +} + +void dsi_pll_uninit(void) +{ + enable_clocks(0); + dsi_enable_pll_clock(0); + + dsi.pll_locked = 0; + dsi_pll_power(DSI_PLL_POWER_OFF); + regulator_disable(dsi.vdds_dsi_reg); + DSSDBG("PLL uninit done\n"); +} + +unsigned long dsi_get_dsi1_pll_rate(void) +{ + return dsi.dsi1_pll_fclk; +} + +unsigned long dsi_get_dsi2_pll_rate(void) +{ + return dsi.dsi2_pll_fclk; +} + +void dsi_dump_clocks(struct seq_file *s) +{ + int clksel; + + enable_clocks(1); + + clksel = REG_GET(DSI_PLL_CONFIGURATION2, 11, 11); + + seq_printf(s, "- dsi -\n"); + + seq_printf(s, "dsi fclk source = %s\n", + dss_get_dsi_clk_source() == 0 ? + "dss1_alwon_fclk" : "dsi2_pll_fclk"); + + seq_printf(s, "dsi pll source = %s\n", + clksel == 0 ? + "dss2_alwon_fclk" : "pclkfree"); + + seq_printf(s, "DSIPHY\t\t%lu\nDDR_CLK\t\t%lu\n", + dsi.dsiphy, dsi.ddr_clk); + + seq_printf(s, "dsi1_pll_fck\t%lu (%s)\n" + "dsi2_pll_fck\t%lu (%s)\n", + dsi.dsi1_pll_fclk, + dss_get_dispc_clk_source() == 0 ? "off" : "on", + dsi.dsi2_pll_fclk, + dss_get_dsi_clk_source() == 0 ? "off" : "on"); + + enable_clocks(0); +} + +void dsi_dump_regs(struct seq_file *s) +{ +#define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(r)) + + dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1); + + DUMPREG(DSI_REVISION); + DUMPREG(DSI_SYSCONFIG); + DUMPREG(DSI_SYSSTATUS); + DUMPREG(DSI_IRQSTATUS); + DUMPREG(DSI_IRQENABLE); + DUMPREG(DSI_CTRL); + DUMPREG(DSI_COMPLEXIO_CFG1); + DUMPREG(DSI_COMPLEXIO_IRQ_STATUS); + DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE); + DUMPREG(DSI_CLK_CTRL); + DUMPREG(DSI_TIMING1); + DUMPREG(DSI_TIMING2); + DUMPREG(DSI_VM_TIMING1); + DUMPREG(DSI_VM_TIMING2); + DUMPREG(DSI_VM_TIMING3); + DUMPREG(DSI_CLK_TIMING); + DUMPREG(DSI_TX_FIFO_VC_SIZE); + DUMPREG(DSI_RX_FIFO_VC_SIZE); + DUMPREG(DSI_COMPLEXIO_CFG2); + DUMPREG(DSI_RX_FIFO_VC_FULLNESS); + DUMPREG(DSI_VM_TIMING4); + DUMPREG(DSI_TX_FIFO_VC_EMPTINESS); + DUMPREG(DSI_VM_TIMING5); + DUMPREG(DSI_VM_TIMING6); + DUMPREG(DSI_VM_TIMING7); + DUMPREG(DSI_STOPCLK_TIMING); + + DUMPREG(DSI_VC_CTRL(0)); + DUMPREG(DSI_VC_TE(0)); + DUMPREG(DSI_VC_LONG_PACKET_HEADER(0)); + DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0)); + DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0)); + DUMPREG(DSI_VC_IRQSTATUS(0)); + DUMPREG(DSI_VC_IRQENABLE(0)); + + DUMPREG(DSI_VC_CTRL(1)); + DUMPREG(DSI_VC_TE(1)); + DUMPREG(DSI_VC_LONG_PACKET_HEADER(1)); + DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1)); + DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1)); + DUMPREG(DSI_VC_IRQSTATUS(1)); + DUMPREG(DSI_VC_IRQENABLE(1)); + + DUMPREG(DSI_VC_CTRL(2)); + DUMPREG(DSI_VC_TE(2)); + DUMPREG(DSI_VC_LONG_PACKET_HEADER(2)); + DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2)); + DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2)); + DUMPREG(DSI_VC_IRQSTATUS(2)); + DUMPREG(DSI_VC_IRQENABLE(2)); + + DUMPREG(DSI_VC_CTRL(3)); + DUMPREG(DSI_VC_TE(3)); + DUMPREG(DSI_VC_LONG_PACKET_HEADER(3)); + DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3)); + DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3)); + DUMPREG(DSI_VC_IRQSTATUS(3)); + DUMPREG(DSI_VC_IRQENABLE(3)); + + DUMPREG(DSI_DSIPHY_CFG0); + DUMPREG(DSI_DSIPHY_CFG1); + DUMPREG(DSI_DSIPHY_CFG2); + DUMPREG(DSI_DSIPHY_CFG5); + + DUMPREG(DSI_PLL_CONTROL); + DUMPREG(DSI_PLL_STATUS); + DUMPREG(DSI_PLL_GO); + DUMPREG(DSI_PLL_CONFIGURATION1); + DUMPREG(DSI_PLL_CONFIGURATION2); + + dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1); +#undef DUMPREG +} + +enum dsi_complexio_power_state { + DSI_COMPLEXIO_POWER_OFF = 0x0, + DSI_COMPLEXIO_POWER_ON = 0x1, + DSI_COMPLEXIO_POWER_ULPS = 0x2, +}; + +static int dsi_complexio_power(enum dsi_complexio_power_state state) +{ + int t = 0; + + /* PWR_CMD */ + REG_FLD_MOD(DSI_COMPLEXIO_CFG1, state, 28, 27); + + /* PWR_STATUS */ + while (FLD_GET(dsi_read_reg(DSI_COMPLEXIO_CFG1), 26, 25) != state) { + udelay(1); + if (t++ > 1000) { + DSSERR("failed to set complexio power state to " + "%d\n", state); + return -ENODEV; + } + } + + return 0; +} + +static void dsi_complexio_config(struct omap_dss_device *dssdev) +{ + u32 r; + + int clk_lane = dssdev->phy.dsi.clk_lane; + int data1_lane = dssdev->phy.dsi.data1_lane; + int data2_lane = dssdev->phy.dsi.data2_lane; + int clk_pol = dssdev->phy.dsi.clk_pol; + int data1_pol = dssdev->phy.dsi.data1_pol; + int data2_pol = dssdev->phy.dsi.data2_pol; + + r = dsi_read_reg(DSI_COMPLEXIO_CFG1); + r = FLD_MOD(r, clk_lane, 2, 0); + r = FLD_MOD(r, clk_pol, 3, 3); + r = FLD_MOD(r, data1_lane, 6, 4); + r = FLD_MOD(r, data1_pol, 7, 7); + r = FLD_MOD(r, data2_lane, 10, 8); + r = FLD_MOD(r, data2_pol, 11, 11); + dsi_write_reg(DSI_COMPLEXIO_CFG1, r); + + /* The configuration of the DSI complex I/O (number of data lanes, + position, differential order) should not be changed while + DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. In order for + the hardware to take into account a new configuration of the complex + I/O (done in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to + follow this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1, + then reset the DSS.DSI_CTRL[0] IF_EN to 0, then set + DSS.DSI_CLK_CTRL[20] LP_CLK_ENABLE to 1 and finally set again the + DSS.DSI_CTRL[0] IF_EN bit to 1. If the sequence is not followed, the + DSI complex I/O configuration is unknown. */ + + /* + REG_FLD_MOD(DSI_CTRL, 1, 0, 0); + REG_FLD_MOD(DSI_CTRL, 0, 0, 0); + REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20); + REG_FLD_MOD(DSI_CTRL, 1, 0, 0); + */ +} + +static inline unsigned ns2ddr(unsigned ns) +{ + /* convert time in ns to ddr ticks, rounding up */ + return (ns * (dsi.ddr_clk/1000/1000) + 999) / 1000; +} + +static inline unsigned ddr2ns(unsigned ddr) +{ + return ddr * 1000 * 1000 / (dsi.ddr_clk / 1000); +} + +static void dsi_complexio_timings(void) +{ + u32 r; + u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit; + u32 tlpx_half, tclk_trail, tclk_zero; + u32 tclk_prepare; + + /* calculate timings */ + + /* 1 * DDR_CLK = 2 * UI */ + + /* min 40ns + 4*UI max 85ns + 6*UI */ + ths_prepare = ns2ddr(70) + 2; + + /* min 145ns + 10*UI */ + ths_prepare_ths_zero = ns2ddr(175) + 2; + + /* min max(8*UI, 60ns+4*UI) */ + ths_trail = ns2ddr(60) + 5; + + /* min 100ns */ + ths_exit = ns2ddr(145); + + /* tlpx min 50n */ + tlpx_half = ns2ddr(25); + + /* min 60ns */ + tclk_trail = ns2ddr(60) + 2; + + /* min 38ns, max 95ns */ + tclk_prepare = ns2ddr(65); + + /* min tclk-prepare + tclk-zero = 300ns */ + tclk_zero = ns2ddr(260); + + DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n", + ths_prepare, ddr2ns(ths_prepare), + ths_prepare_ths_zero, ddr2ns(ths_prepare_ths_zero)); + DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n", + ths_trail, ddr2ns(ths_trail), + ths_exit, ddr2ns(ths_exit)); + + DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), " + "tclk_zero %u (%uns)\n", + tlpx_half, ddr2ns(tlpx_half), + tclk_trail, ddr2ns(tclk_trail), + tclk_zero, ddr2ns(tclk_zero)); + DSSDBG("tclk_prepare %u (%uns)\n", + tclk_prepare, ddr2ns(tclk_prepare)); + + /* program timings */ + + r = dsi_read_reg(DSI_DSIPHY_CFG0); + r = FLD_MOD(r, ths_prepare, 31, 24); + r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16); + r = FLD_MOD(r, ths_trail, 15, 8); + r = FLD_MOD(r, ths_exit, 7, 0); + dsi_write_reg(DSI_DSIPHY_CFG0, r); + + r = dsi_read_reg(DSI_DSIPHY_CFG1); + r = FLD_MOD(r, tlpx_half, 22, 16); + r = FLD_MOD(r, tclk_trail, 15, 8); + r = FLD_MOD(r, tclk_zero, 7, 0); + dsi_write_reg(DSI_DSIPHY_CFG1, r); + + r = dsi_read_reg(DSI_DSIPHY_CFG2); + r = FLD_MOD(r, tclk_prepare, 7, 0); + dsi_write_reg(DSI_DSIPHY_CFG2, r); +} + + +static int dsi_complexio_init(struct omap_dss_device *dssdev) +{ + int r = 0; + + DSSDBG("dsi_complexio_init\n"); + + /* CIO_CLK_ICG, enable L3 clk to CIO */ + REG_FLD_MOD(DSI_CLK_CTRL, 1, 14, 14); + + /* A dummy read using the SCP interface to any DSIPHY register is + * required after DSIPHY reset to complete the reset of the DSI complex + * I/O. */ + dsi_read_reg(DSI_DSIPHY_CFG5); + + if (wait_for_bit_change(DSI_DSIPHY_CFG5, 30, 1) != 1) { + DSSERR("ComplexIO PHY not coming out of reset.\n"); + r = -ENODEV; + goto err; + } + + dsi_complexio_config(dssdev); + + r = dsi_complexio_power(DSI_COMPLEXIO_POWER_ON); + + if (r) + goto err; + + if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 29, 1) != 1) { + DSSERR("ComplexIO not coming out of reset.\n"); + r = -ENODEV; + goto err; + } + + if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 21, 1) != 1) { + DSSERR("ComplexIO LDO power down.\n"); + r = -ENODEV; + goto err; + } + + dsi_complexio_timings(); + + /* + The configuration of the DSI complex I/O (number of data lanes, + position, differential order) should not be changed while + DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. For the + hardware to recognize a new configuration of the complex I/O (done + in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to follow + this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1, next + reset the DSS.DSI_CTRL[0] IF_EN to 0, then set DSS.DSI_CLK_CTRL[20] + LP_CLK_ENABLE to 1, and finally, set again the DSS.DSI_CTRL[0] IF_EN + bit to 1. If the sequence is not followed, the DSi complex I/O + configuration is undetermined. + */ + dsi_if_enable(1); + dsi_if_enable(0); + REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */ + dsi_if_enable(1); + dsi_if_enable(0); + + DSSDBG("CIO init done\n"); +err: + return r; +} + +static void dsi_complexio_uninit(void) +{ + dsi_complexio_power(DSI_COMPLEXIO_POWER_OFF); +} + +static int _dsi_wait_reset(void) +{ + int i = 0; + + while (REG_GET(DSI_SYSSTATUS, 0, 0) == 0) { + if (i++ > 5) { + DSSERR("soft reset failed\n"); + return -ENODEV; + } + udelay(1); + } + + return 0; +} + +static int _dsi_reset(void) +{ + /* Soft reset */ + REG_FLD_MOD(DSI_SYSCONFIG, 1, 1, 1); + return _dsi_wait_reset(); +} + + +static void dsi_config_tx_fifo(enum fifo_size size1, enum fifo_size size2, + enum fifo_size size3, enum fifo_size size4) +{ + u32 r = 0; + int add = 0; + int i; + + dsi.vc[0].fifo_size = size1; + dsi.vc[1].fifo_size = size2; + dsi.vc[2].fifo_size = size3; + dsi.vc[3].fifo_size = size4; + + for (i = 0; i < 4; i++) { + u8 v; + int size = dsi.vc[i].fifo_size; + + if (add + size > 4) { + DSSERR("Illegal FIFO configuration\n"); + BUG(); + } + + v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4); + r |= v << (8 * i); + /*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */ + add += size; + } + + dsi_write_reg(DSI_TX_FIFO_VC_SIZE, r); +} + +static void dsi_config_rx_fifo(enum fifo_size size1, enum fifo_size size2, + enum fifo_size size3, enum fifo_size size4) +{ + u32 r = 0; + int add = 0; + int i; + + dsi.vc[0].fifo_size = size1; + dsi.vc[1].fifo_size = size2; + dsi.vc[2].fifo_size = size3; + dsi.vc[3].fifo_size = size4; + + for (i = 0; i < 4; i++) { + u8 v; + int size = dsi.vc[i].fifo_size; + + if (add + size > 4) { + DSSERR("Illegal FIFO configuration\n"); + BUG(); + } + + v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4); + r |= v << (8 * i); + /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */ + add += size; + } + + dsi_write_reg(DSI_RX_FIFO_VC_SIZE, r); +} + +static int dsi_force_tx_stop_mode_io(void) +{ + u32 r; + + r = dsi_read_reg(DSI_TIMING1); + r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */ + dsi_write_reg(DSI_TIMING1, r); + + if (wait_for_bit_change(DSI_TIMING1, 15, 0) != 0) { + DSSERR("TX_STOP bit not going down\n"); + return -EIO; + } + + return 0; +} + +static void dsi_vc_print_status(int channel) +{ + u32 r; + + r = dsi_read_reg(DSI_VC_CTRL(channel)); + DSSDBG("vc %d: TX_FIFO_NOT_EMPTY %d, BTA_EN %d, VC_BUSY %d, " + "TX_FIFO_FULL %d, RX_FIFO_NOT_EMPTY %d, ", + channel, + FLD_GET(r, 5, 5), + FLD_GET(r, 6, 6), + FLD_GET(r, 15, 15), + FLD_GET(r, 16, 16), + FLD_GET(r, 20, 20)); + + r = dsi_read_reg(DSI_TX_FIFO_VC_EMPTINESS); + DSSDBG("EMPTINESS %d\n", (r >> (8 * channel)) & 0xff); +} + +static int dsi_vc_enable(int channel, bool enable) +{ + if (dsi.update_mode != OMAP_DSS_UPDATE_AUTO) + DSSDBG("dsi_vc_enable channel %d, enable %d\n", + channel, enable); + + enable = enable ? 1 : 0; + + REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 0, 0); + + if (wait_for_bit_change(DSI_VC_CTRL(channel), 0, enable) != enable) { + DSSERR("Failed to set dsi_vc_enable to %d\n", enable); + return -EIO; + } + + return 0; +} + +static void dsi_vc_initial_config(int channel) +{ + u32 r; + + DSSDBGF("%d", channel); + + r = dsi_read_reg(DSI_VC_CTRL(channel)); + + if (FLD_GET(r, 15, 15)) /* VC_BUSY */ + DSSERR("VC(%d) busy when trying to configure it!\n", + channel); + + r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */ + r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */ + r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */ + r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */ + r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */ + r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */ + r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */ + + r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */ + r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */ + + dsi_write_reg(DSI_VC_CTRL(channel), r); + + dsi.vc[channel].mode = DSI_VC_MODE_L4; +} + +static void dsi_vc_config_l4(int channel) +{ + if (dsi.vc[channel].mode == DSI_VC_MODE_L4) + return; + + DSSDBGF("%d", channel); + + dsi_vc_enable(channel, 0); + + if (REG_GET(DSI_VC_CTRL(channel), 15, 15)) /* VC_BUSY */ + DSSERR("vc(%d) busy when trying to config for L4\n", channel); + + REG_FLD_MOD(DSI_VC_CTRL(channel), 0, 1, 1); /* SOURCE, 0 = L4 */ + + dsi_vc_enable(channel, 1); + + dsi.vc[channel].mode = DSI_VC_MODE_L4; +} + +static void dsi_vc_config_vp(int channel) +{ + if (dsi.vc[channel].mode == DSI_VC_MODE_VP) + return; + + DSSDBGF("%d", channel); + + dsi_vc_enable(channel, 0); + + if (REG_GET(DSI_VC_CTRL(channel), 15, 15)) /* VC_BUSY */ + DSSERR("vc(%d) busy when trying to config for VP\n", channel); + + REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 1, 1); /* SOURCE, 1 = video port */ + + dsi_vc_enable(channel, 1); + + dsi.vc[channel].mode = DSI_VC_MODE_VP; +} + + +static void dsi_vc_enable_hs(int channel, bool enable) +{ + DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable); + + dsi_vc_enable(channel, 0); + dsi_if_enable(0); + + REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 9, 9); + + dsi_vc_enable(channel, 1); + dsi_if_enable(1); + + dsi_force_tx_stop_mode_io(); +} + +static void dsi_vc_flush_long_data(int channel) +{ + while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { + u32 val; + val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel)); + DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n", + (val >> 0) & 0xff, + (val >> 8) & 0xff, + (val >> 16) & 0xff, + (val >> 24) & 0xff); + } +} + +static void dsi_show_rx_ack_with_err(u16 err) +{ + DSSERR("\tACK with ERROR (%#x):\n", err); + if (err & (1 << 0)) + DSSERR("\t\tSoT Error\n"); + if (err & (1 << 1)) + DSSERR("\t\tSoT Sync Error\n"); + if (err & (1 << 2)) + DSSERR("\t\tEoT Sync Error\n"); + if (err & (1 << 3)) + DSSERR("\t\tEscape Mode Entry Command Error\n"); + if (err & (1 << 4)) + DSSERR("\t\tLP Transmit Sync Error\n"); + if (err & (1 << 5)) + DSSERR("\t\tHS Receive Timeout Error\n"); + if (err & (1 << 6)) + DSSERR("\t\tFalse Control Error\n"); + if (err & (1 << 7)) + DSSERR("\t\t(reserved7)\n"); + if (err & (1 << 8)) + DSSERR("\t\tECC Error, single-bit (corrected)\n"); + if (err & (1 << 9)) + DSSERR("\t\tECC Error, multi-bit (not corrected)\n"); + if (err & (1 << 10)) + DSSERR("\t\tChecksum Error\n"); + if (err & (1 << 11)) + DSSERR("\t\tData type not recognized\n"); + if (err & (1 << 12)) + DSSERR("\t\tInvalid VC ID\n"); + if (err & (1 << 13)) + DSSERR("\t\tInvalid Transmission Length\n"); + if (err & (1 << 14)) + DSSERR("\t\t(reserved14)\n"); + if (err & (1 << 15)) + DSSERR("\t\tDSI Protocol Violation\n"); +} + +static u16 dsi_vc_flush_receive_data(int channel) +{ + /* RX_FIFO_NOT_EMPTY */ + while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { + u32 val; + u8 dt; + val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel)); + DSSDBG("\trawval %#08x\n", val); + dt = FLD_GET(val, 5, 0); + if (dt == DSI_DT_RX_ACK_WITH_ERR) { + u16 err = FLD_GET(val, 23, 8); + dsi_show_rx_ack_with_err(err); + } else if (dt == DSI_DT_RX_SHORT_READ_1) { + DSSDBG("\tDCS short response, 1 byte: %#x\n", + FLD_GET(val, 23, 8)); + } else if (dt == DSI_DT_RX_SHORT_READ_2) { + DSSDBG("\tDCS short response, 2 byte: %#x\n", + FLD_GET(val, 23, 8)); + } else if (dt == DSI_DT_RX_DCS_LONG_READ) { + DSSDBG("\tDCS long response, len %d\n", + FLD_GET(val, 23, 8)); + dsi_vc_flush_long_data(channel); + } else { + DSSERR("\tunknown datatype 0x%02x\n", dt); + } + } + return 0; +} + +static int dsi_vc_send_bta(int channel) +{ + if (dsi.update_mode != OMAP_DSS_UPDATE_AUTO && + (dsi.debug_write || dsi.debug_read)) + DSSDBG("dsi_vc_send_bta %d\n", channel); + + WARN_ON(!mutex_is_locked(&dsi.bus_lock)); + + if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */ + DSSERR("rx fifo not empty when sending BTA, dumping data:\n"); + dsi_vc_flush_receive_data(channel); + } + + REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */ + + return 0; +} + +int dsi_vc_send_bta_sync(int channel) +{ + int r = 0; + u32 err; + + INIT_COMPLETION(dsi.bta_completion); + + dsi_vc_enable_bta_irq(channel); + + r = dsi_vc_send_bta(channel); + if (r) + goto err; + + if (wait_for_completion_timeout(&dsi.bta_completion, + msecs_to_jiffies(500)) == 0) { + DSSERR("Failed to receive BTA\n"); + r = -EIO; + goto err; + } + + err = dsi_get_errors(); + if (err) { + DSSERR("Error while sending BTA: %x\n", err); + r = -EIO; + goto err; + } +err: + dsi_vc_disable_bta_irq(channel); + + return r; +} +EXPORT_SYMBOL(dsi_vc_send_bta_sync); + +static inline void dsi_vc_write_long_header(int channel, u8 data_type, + u16 len, u8 ecc) +{ + u32 val; + u8 data_id; + + WARN_ON(!mutex_is_locked(&dsi.bus_lock)); + + /*data_id = data_type | channel << 6; */ + data_id = data_type | dsi.vc[channel].dest_per << 6; + + val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) | + FLD_VAL(ecc, 31, 24); + + dsi_write_reg(DSI_VC_LONG_PACKET_HEADER(channel), val); +} + +static inline void dsi_vc_write_long_payload(int channel, + u8 b1, u8 b2, u8 b3, u8 b4) +{ + u32 val; + + val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0; + +/* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n", + b1, b2, b3, b4, val); */ + + dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(channel), val); +} + +static int dsi_vc_send_long(int channel, u8 data_type, u8 *data, u16 len, + u8 ecc) +{ + /*u32 val; */ + int i; + u8 *p; + int r = 0; + u8 b1, b2, b3, b4; + + if (dsi.debug_write) + DSSDBG("dsi_vc_send_long, %d bytes\n", len); + + /* len + header */ + if (dsi.vc[channel].fifo_size * 32 * 4 < len + 4) { + DSSERR("unable to send long packet: packet too long.\n"); + return -EINVAL; + } + + dsi_vc_config_l4(channel); + + dsi_vc_write_long_header(channel, data_type, len, ecc); + + /*dsi_vc_print_status(0); */ + + p = data; + for (i = 0; i < len >> 2; i++) { + if (dsi.debug_write) + DSSDBG("\tsending full packet %d\n", i); + /*dsi_vc_print_status(0); */ + + b1 = *p++; + b2 = *p++; + b3 = *p++; + b4 = *p++; + + dsi_vc_write_long_payload(channel, b1, b2, b3, b4); + } + + i = len % 4; + if (i) { + b1 = 0; b2 = 0; b3 = 0; + + if (dsi.debug_write) + DSSDBG("\tsending remainder bytes %d\n", i); + + switch (i) { + case 3: + b1 = *p++; + b2 = *p++; + b3 = *p++; + break; + case 2: + b1 = *p++; + b2 = *p++; + break; + case 1: + b1 = *p++; + break; + } + + dsi_vc_write_long_payload(channel, b1, b2, b3, 0); + } + + return r; +} + +static int dsi_vc_send_short(int channel, u8 data_type, u16 data, u8 ecc) +{ + u32 r; + u8 data_id; + + WARN_ON(!mutex_is_locked(&dsi.bus_lock)); + + if (dsi.debug_write) + DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n", + channel, + data_type, data & 0xff, (data >> 8) & 0xff); + + dsi_vc_config_l4(channel); + + if (FLD_GET(dsi_read_reg(DSI_VC_CTRL(channel)), 16, 16)) { + DSSERR("ERROR FIFO FULL, aborting transfer\n"); + return -EINVAL; + } + + data_id = data_type | channel << 6; + + r = (data_id << 0) | (data << 8) | (ecc << 24); + + dsi_write_reg(DSI_VC_SHORT_PACKET_HEADER(channel), r); + + return 0; +} + +int dsi_vc_send_null(int channel) +{ + u8 nullpkg[] = {0, 0, 0, 0}; + return dsi_vc_send_long(0, DSI_DT_NULL_PACKET, nullpkg, 4, 0); +} +EXPORT_SYMBOL(dsi_vc_send_null); + +int dsi_vc_dcs_write_nosync(int channel, u8 *data, int len) +{ + int r; + + BUG_ON(len == 0); + + if (len == 1) { + r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_0, + data[0], 0); + } else if (len == 2) { + r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_1, + data[0] | (data[1] << 8), 0); + } else { + /* 0x39 = DCS Long Write */ + r = dsi_vc_send_long(channel, DSI_DT_DCS_LONG_WRITE, + data, len, 0); + } + + return r; +} +EXPORT_SYMBOL(dsi_vc_dcs_write_nosync); + +int dsi_vc_dcs_write(int channel, u8 *data, int len) +{ + int r; + + r = dsi_vc_dcs_write_nosync(channel, data, len); + if (r) + return r; + + r = dsi_vc_send_bta_sync(channel); + + return r; +} +EXPORT_SYMBOL(dsi_vc_dcs_write); + +int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen) +{ + u32 val; + u8 dt; + int r; + + if (dsi.debug_read) + DSSDBG("dsi_vc_dcs_read(ch%d, dcs_cmd %u)\n", channel, dcs_cmd); + + r = dsi_vc_send_short(channel, DSI_DT_DCS_READ, dcs_cmd, 0); + if (r) + return r; + + r = dsi_vc_send_bta_sync(channel); + if (r) + return r; + + /* RX_FIFO_NOT_EMPTY */ + if (REG_GET(DSI_VC_CTRL(channel), 20, 20) == 0) { + DSSERR("RX fifo empty when trying to read.\n"); + return -EIO; + } + + val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel)); + if (dsi.debug_read) + DSSDBG("\theader: %08x\n", val); + dt = FLD_GET(val, 5, 0); + if (dt == DSI_DT_RX_ACK_WITH_ERR) { + u16 err = FLD_GET(val, 23, 8); + dsi_show_rx_ack_with_err(err); + return -EIO; + + } else if (dt == DSI_DT_RX_SHORT_READ_1) { + u8 data = FLD_GET(val, 15, 8); + if (dsi.debug_read) + DSSDBG("\tDCS short response, 1 byte: %02x\n", data); + + if (buflen < 1) + return -EIO; + + buf[0] = data; + + return 1; + } else if (dt == DSI_DT_RX_SHORT_READ_2) { + u16 data = FLD_GET(val, 23, 8); + if (dsi.debug_read) + DSSDBG("\tDCS short response, 2 byte: %04x\n", data); + + if (buflen < 2) + return -EIO; + + buf[0] = data & 0xff; + buf[1] = (data >> 8) & 0xff; + + return 2; + } else if (dt == DSI_DT_RX_DCS_LONG_READ) { + int w; + int len = FLD_GET(val, 23, 8); + if (dsi.debug_read) + DSSDBG("\tDCS long response, len %d\n", len); + + if (len > buflen) + return -EIO; + + /* two byte checksum ends the packet, not included in len */ + for (w = 0; w < len + 2;) { + int b; + val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel)); + if (dsi.debug_read) + DSSDBG("\t\t%02x %02x %02x %02x\n", + (val >> 0) & 0xff, + (val >> 8) & 0xff, + (val >> 16) & 0xff, + (val >> 24) & 0xff); + + for (b = 0; b < 4; ++b) { + if (w < len) + buf[w] = (val >> (b * 8)) & 0xff; + /* we discard the 2 byte checksum */ + ++w; + } + } + + return len; + + } else { + DSSERR("\tunknown datatype 0x%02x\n", dt); + return -EIO; + } +} +EXPORT_SYMBOL(dsi_vc_dcs_read); + + +int dsi_vc_set_max_rx_packet_size(int channel, u16 len) +{ + return dsi_vc_send_short(channel, DSI_DT_SET_MAX_RET_PKG_SIZE, + len, 0); +} +EXPORT_SYMBOL(dsi_vc_set_max_rx_packet_size); + + +static int dsi_set_lp_rx_timeout(int ns, int x4, int x16) +{ + u32 r; + unsigned long fck; + int ticks; + + /* ticks in DSI_FCK */ + + fck = dsi_fclk_rate(); + ticks = (fck / 1000 / 1000) * ns / 1000; + + if (ticks > 0x1fff) { + DSSERR("LP_TX_TO too high\n"); + return -EINVAL; + } + + r = dsi_read_reg(DSI_TIMING2); + r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */ + r = FLD_MOD(r, x16, 14, 14); /* LP_RX_TO_X16 */ + r = FLD_MOD(r, x4, 13, 13); /* LP_RX_TO_X4 */ + r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */ + dsi_write_reg(DSI_TIMING2, r); + + DSSDBG("LP_RX_TO %ld ns (%#x ticks)\n", + (ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1) * 1000) / + (fck / 1000 / 1000), + ticks); + + return 0; +} + +static int dsi_set_ta_timeout(int ns, int x8, int x16) +{ + u32 r; + unsigned long fck; + int ticks; + + /* ticks in DSI_FCK */ + + fck = dsi_fclk_rate(); + ticks = (fck / 1000 / 1000) * ns / 1000; + + if (ticks > 0x1fff) { + DSSERR("TA_TO too high\n"); + return -EINVAL; + } + + r = dsi_read_reg(DSI_TIMING1); + r = FLD_MOD(r, 1, 31, 31); /* TA_TO */ + r = FLD_MOD(r, x16, 30, 30); /* TA_TO_X16 */ + r = FLD_MOD(r, x8, 29, 29); /* TA_TO_X8 */ + r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */ + dsi_write_reg(DSI_TIMING1, r); + + DSSDBG("TA_TO %ld ns (%#x ticks)\n", + (ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1) * 1000) / + (fck / 1000 / 1000), + ticks); + + return 0; +} + +static int dsi_set_stop_state_counter(int ns, int x4, int x16) +{ + u32 r; + unsigned long fck; + int ticks; + + /* ticks in DSI_FCK */ + + fck = dsi_fclk_rate(); + ticks = (fck / 1000 / 1000) * ns / 1000; + + if (ticks > 0x1fff) { + DSSERR("STOP_STATE_COUNTER_IO too high\n"); + return -EINVAL; + } + + r = dsi_read_reg(DSI_TIMING1); + r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */ + r = FLD_MOD(r, x16, 14, 14); /* STOP_STATE_X16_IO */ + r = FLD_MOD(r, x4, 13, 13); /* STOP_STATE_X4_IO */ + r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */ + dsi_write_reg(DSI_TIMING1, r); + + DSSDBG("STOP_STATE_COUNTER %ld ns (%#x ticks)\n", + (ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1) * 1000) / + (fck / 1000 / 1000), + ticks); + + return 0; +} + +static int dsi_set_hs_tx_timeout(int ns, int x4, int x16) +{ + u32 r; + unsigned long fck; + int ticks; + + /* ticks in TxByteClkHS */ + + fck = dsi.ddr_clk / 4; + ticks = (fck / 1000 / 1000) * ns / 1000; + + if (ticks > 0x1fff) { + DSSERR("HS_TX_TO too high\n"); + return -EINVAL; + } + + r = dsi_read_reg(DSI_TIMING2); + r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */ + r = FLD_MOD(r, x16, 30, 30); /* HS_TX_TO_X16 */ + r = FLD_MOD(r, x4, 29, 29); /* HS_TX_TO_X8 (4 really) */ + r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */ + dsi_write_reg(DSI_TIMING2, r); + + DSSDBG("HS_TX_TO %ld ns (%#x ticks)\n", + (ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1) * 1000) / + (fck / 1000 / 1000), + ticks); + + return 0; +} +static int dsi_proto_config(struct omap_dss_device *dssdev) +{ + u32 r; + int buswidth = 0; + int div; + + dsi_config_tx_fifo(DSI_FIFO_SIZE_128, + DSI_FIFO_SIZE_0, + DSI_FIFO_SIZE_0, + DSI_FIFO_SIZE_0); + + dsi_config_rx_fifo(DSI_FIFO_SIZE_128, + DSI_FIFO_SIZE_0, + DSI_FIFO_SIZE_0, + DSI_FIFO_SIZE_0); + + /* XXX what values for the timeouts? */ + dsi_set_stop_state_counter(1000, 0, 0); + + dsi_set_ta_timeout(50000, 1, 1); + + /* 3000ns * 16 */ + dsi_set_lp_rx_timeout(3000, 0, 1); + + /* 10000ns * 4 */ + dsi_set_hs_tx_timeout(10000, 1, 0); + + switch (dssdev->ctrl.pixel_size) { + case 16: + buswidth = 0; + break; + case 18: + buswidth = 1; + break; + case 24: + buswidth = 2; + break; + default: + BUG(); + } + + r = dsi_read_reg(DSI_CTRL); + r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */ + r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */ + r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */ + + div = dispc_lclk_rate() / dispc_pclk_rate(); + r = FLD_MOD(r, div == 2 ? 0 : 1, 4, 4); /* VP_CLK_RATIO */ + r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */ + r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */ + r = FLD_MOD(r, 2, 13, 12); /* LINE_BUFFER, 2 lines */ + r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */ + r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */ + r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */ + r = FLD_MOD(r, 0, 25, 25); /* DCS_CMD_CODE, 1=start, 0=continue */ + + dsi_write_reg(DSI_CTRL, r); + + dsi_vc_initial_config(0); + + /* set all vc targets to peripheral 0 */ + dsi.vc[0].dest_per = 0; + dsi.vc[1].dest_per = 0; + dsi.vc[2].dest_per = 0; + dsi.vc[3].dest_per = 0; + + return 0; +} + +static void dsi_proto_timings(struct omap_dss_device *dssdev) +{ + unsigned tlpx, tclk_zero, tclk_prepare, tclk_trail; + unsigned tclk_pre, tclk_post; + unsigned ths_prepare, ths_prepare_ths_zero, ths_zero; + unsigned ths_trail, ths_exit; + unsigned ddr_clk_pre, ddr_clk_post; + unsigned enter_hs_mode_lat, exit_hs_mode_lat; + unsigned ths_eot; + u32 r; + + r = dsi_read_reg(DSI_DSIPHY_CFG0); + ths_prepare = FLD_GET(r, 31, 24); + ths_prepare_ths_zero = FLD_GET(r, 23, 16); + ths_zero = ths_prepare_ths_zero - ths_prepare; + ths_trail = FLD_GET(r, 15, 8); + ths_exit = FLD_GET(r, 7, 0); + + r = dsi_read_reg(DSI_DSIPHY_CFG1); + tlpx = FLD_GET(r, 22, 16) * 2; + tclk_trail = FLD_GET(r, 15, 8); + tclk_zero = FLD_GET(r, 7, 0); + + r = dsi_read_reg(DSI_DSIPHY_CFG2); + tclk_prepare = FLD_GET(r, 7, 0); + + /* min 8*UI */ + tclk_pre = 20; + /* min 60ns + 52*UI */ + tclk_post = ns2ddr(60) + 26; + + /* ths_eot is 2 for 2 datalanes and 4 for 1 datalane */ + if (dssdev->phy.dsi.data1_lane != 0 && + dssdev->phy.dsi.data2_lane != 0) + ths_eot = 2; + else + ths_eot = 4; + + ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare, + 4); + ddr_clk_post = DIV_ROUND_UP(tclk_post + tclk_trail, 4) + ths_eot; + + BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255); + BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255); + + r = dsi_read_reg(DSI_CLK_TIMING); + r = FLD_MOD(r, ddr_clk_pre, 15, 8); + r = FLD_MOD(r, ddr_clk_post, 7, 0); + dsi_write_reg(DSI_CLK_TIMING, r); + + DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n", + ddr_clk_pre, + ddr_clk_post); + + enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) + + DIV_ROUND_UP(ths_prepare, 4) + + DIV_ROUND_UP(ths_zero + 3, 4); + + exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot; + + r = FLD_VAL(enter_hs_mode_lat, 31, 16) | + FLD_VAL(exit_hs_mode_lat, 15, 0); + dsi_write_reg(DSI_VM_TIMING7, r); + + DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n", + enter_hs_mode_lat, exit_hs_mode_lat); +} + + +#define DSI_DECL_VARS \ + int __dsi_cb = 0; u32 __dsi_cv = 0; + +#define DSI_FLUSH(ch) \ + if (__dsi_cb > 0) { \ + /*DSSDBG("sending long packet %#010x\n", __dsi_cv);*/ \ + dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(ch), __dsi_cv); \ + __dsi_cb = __dsi_cv = 0; \ + } + +#define DSI_PUSH(ch, data) \ + do { \ + __dsi_cv |= (data) << (__dsi_cb * 8); \ + /*DSSDBG("cv = %#010x, cb = %d\n", __dsi_cv, __dsi_cb);*/ \ + if (++__dsi_cb > 3) \ + DSI_FLUSH(ch); \ + } while (0) + +static int dsi_update_screen_l4(struct omap_dss_device *dssdev, + int x, int y, int w, int h) +{ + /* Note: supports only 24bit colors in 32bit container */ + int first = 1; + int fifo_stalls = 0; + int max_dsi_packet_size; + int max_data_per_packet; + int max_pixels_per_packet; + int pixels_left; + int bytespp = dssdev->ctrl.pixel_size / 8; + int scr_width; + u32 __iomem *data; + int start_offset; + int horiz_inc; + int current_x; + struct omap_overlay *ovl; + + debug_irq = 0; + + DSSDBG("dsi_update_screen_l4 (%d,%d %dx%d)\n", + x, y, w, h); + + ovl = dssdev->manager->overlays[0]; + + if (ovl->info.color_mode != OMAP_DSS_COLOR_RGB24U) + return -EINVAL; + + if (dssdev->ctrl.pixel_size != 24) + return -EINVAL; + + scr_width = ovl->info.screen_width; + data = ovl->info.vaddr; + + start_offset = scr_width * y + x; + horiz_inc = scr_width - w; + current_x = x; + + /* We need header(4) + DCSCMD(1) + pixels(numpix*bytespp) bytes + * in fifo */ + + /* When using CPU, max long packet size is TX buffer size */ + max_dsi_packet_size = dsi.vc[0].fifo_size * 32 * 4; + + /* we seem to get better perf if we divide the tx fifo to half, + and while the other half is being sent, we fill the other half + max_dsi_packet_size /= 2; */ + + max_data_per_packet = max_dsi_packet_size - 4 - 1; + + max_pixels_per_packet = max_data_per_packet / bytespp; + + DSSDBG("max_pixels_per_packet %d\n", max_pixels_per_packet); + + pixels_left = w * h; + + DSSDBG("total pixels %d\n", pixels_left); + + data += start_offset; + + while (pixels_left > 0) { + /* 0x2c = write_memory_start */ + /* 0x3c = write_memory_continue */ + u8 dcs_cmd = first ? 0x2c : 0x3c; + int pixels; + DSI_DECL_VARS; + first = 0; + +#if 1 + /* using fifo not empty */ + /* TX_FIFO_NOT_EMPTY */ + while (FLD_GET(dsi_read_reg(DSI_VC_CTRL(0)), 5, 5)) { + udelay(1); + fifo_stalls++; + if (fifo_stalls > 0xfffff) { + DSSERR("fifo stalls overflow, pixels left %d\n", + pixels_left); + dsi_if_enable(0); + return -EIO; + } + } +#elif 1 + /* using fifo emptiness */ + while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 < + max_dsi_packet_size) { + fifo_stalls++; + if (fifo_stalls > 0xfffff) { + DSSERR("fifo stalls overflow, pixels left %d\n", + pixels_left); + dsi_if_enable(0); + return -EIO; + } + } +#else + while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 == 0) { + fifo_stalls++; + if (fifo_stalls > 0xfffff) { + DSSERR("fifo stalls overflow, pixels left %d\n", + pixels_left); + dsi_if_enable(0); + return -EIO; + } + } +#endif + pixels = min(max_pixels_per_packet, pixels_left); + + pixels_left -= pixels; + + dsi_vc_write_long_header(0, DSI_DT_DCS_LONG_WRITE, + 1 + pixels * bytespp, 0); + + DSI_PUSH(0, dcs_cmd); + + while (pixels-- > 0) { + u32 pix = __raw_readl(data++); + + DSI_PUSH(0, (pix >> 16) & 0xff); + DSI_PUSH(0, (pix >> 8) & 0xff); + DSI_PUSH(0, (pix >> 0) & 0xff); + + current_x++; + if (current_x == x+w) { + current_x = x; + data += horiz_inc; + } + } + + DSI_FLUSH(0); + } + + return 0; +} + +static void dsi_update_screen_dispc(struct omap_dss_device *dssdev, + u16 x, u16 y, u16 w, u16 h) +{ + int bytespp = dssdev->ctrl.pixel_size / 8; + int len; + int total_len; + int packet_payload; + int packet_len; + u32 l; + bool use_te_trigger; + const int channel = 0; + + use_te_trigger = dsi.te_enabled && !dsi.use_ext_te; + + if (dsi.update_mode != OMAP_DSS_UPDATE_AUTO) + DSSDBG("dsi_update_screen_dispc(%d,%d %dx%d)\n", + x, y, w, h); + + len = w * h * bytespp; + + /* XXX: one packet could be longer, I think? Line buffer is + * 1024 x 24bits, but we have to put DCS cmd there also. + * 1023 * 3 should work, but causes strange color effects. */ + packet_payload = min(w, (u16)1020) * bytespp; + + packet_len = packet_payload + 1; /* 1 byte for DCS cmd */ + total_len = (len / packet_payload) * packet_len; + + if (len % packet_payload) + total_len += (len % packet_payload) + 1; + + if (0) + dsi_vc_print_status(1); + + l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */ + dsi_write_reg(DSI_VC_TE(channel), l); + + dsi_vc_write_long_header(channel, DSI_DT_DCS_LONG_WRITE, packet_len, 0); + + if (use_te_trigger) + l = FLD_MOD(l, 1, 30, 30); /* TE_EN */ + else + l = FLD_MOD(l, 1, 31, 31); /* TE_START */ + dsi_write_reg(DSI_VC_TE(channel), l); + + /* We put SIDLEMODE to no-idle for the duration of the transfer, + * because DSS interrupts are not capable of waking up the CPU and the + * framedone interrupt could be delayed for quite a long time. I think + * the same goes for any DSS interrupts, but for some reason I have not + * seen the problem anywhere else than here. + */ + dispc_disable_sidle(); + + dss_start_update(dssdev); + + if (use_te_trigger) { + /* disable LP_RX_TO, so that we can receive TE. Time to wait + * for TE is longer than the timer allows */ + REG_FLD_MOD(DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */ + + dsi_vc_send_bta(channel); + } +} + +static void dsi_framedone_irq_callback(void *data, u32 mask) +{ + /* Note: We get FRAMEDONE when DISPC has finished sending pixels and + * turns itself off. However, DSI still has the pixels in its buffers, + * and is sending the data. + */ + + /* SIDLEMODE back to smart-idle */ + dispc_enable_sidle(); + + dsi.framedone_received = true; + wake_up(&dsi.waitqueue); +} + +static void dsi_set_update_region(struct omap_dss_device *dssdev, + u16 x, u16 y, u16 w, u16 h) +{ + spin_lock(&dsi.update_lock); + if (dsi.update_region.dirty) { + dsi.update_region.x = min(x, dsi.update_region.x); + dsi.update_region.y = min(y, dsi.update_region.y); + dsi.update_region.w = max(w, dsi.update_region.w); + dsi.update_region.h = max(h, dsi.update_region.h); + } else { + dsi.update_region.x = x; + dsi.update_region.y = y; + dsi.update_region.w = w; + dsi.update_region.h = h; + } + + dsi.update_region.device = dssdev; + dsi.update_region.dirty = true; + + spin_unlock(&dsi.update_lock); + +} + +static void dsi_start_auto_update(struct omap_dss_device *dssdev) +{ + u16 w, h; + int i; + + DSSDBG("starting auto update\n"); + + /* In automatic mode the overlay settings are applied like on DPI/SDI. + * Mark the overlays dirty, so that we get the overlays configured, as + * manual mode has left them in bad shape after config partia planes */ + for (i = 0; i < omap_dss_get_num_overlays(); ++i) { + struct omap_overlay *ovl; + ovl = omap_dss_get_overlay(i); + if (ovl->manager == dssdev->manager) + ovl->info_dirty = true; + } + dssdev->manager->apply(dssdev->manager); + + dssdev->get_resolution(dssdev, &w, &h); + + dsi_set_update_region(dssdev, 0, 0, w, h); + + dsi_perf_mark_start_auto(); + + wake_up(&dsi.waitqueue); +} + +static int dsi_set_te(struct omap_dss_device *dssdev, bool enable) +{ + int r; + r = dssdev->driver->enable_te(dssdev, enable); + /* XXX for some reason, DSI TE breaks if we don't wait here. + * Panel bug? Needs more studying */ + msleep(100); + return r; +} + +static void dsi_handle_framedone(void) +{ + int r; + const int channel = 0; + bool use_te_trigger; + + use_te_trigger = dsi.te_enabled && !dsi.use_ext_te; + + if (dsi.update_mode != OMAP_DSS_UPDATE_AUTO) + DSSDBG("FRAMEDONE\n"); + + if (use_te_trigger) { + /* enable LP_RX_TO again after the TE */ + REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */ + } + + /* Send BTA after the frame. We need this for the TE to work, as TE + * trigger is only sent for BTAs without preceding packet. Thus we need + * to BTA after the pixel packets so that next BTA will cause TE + * trigger. + * + * This is not needed when TE is not in use, but we do it anyway to + * make sure that the transfer has been completed. It would be more + * optimal, but more complex, to wait only just before starting next + * transfer. */ + r = dsi_vc_send_bta_sync(channel); + if (r) + DSSERR("BTA after framedone failed\n"); + +#ifdef CONFIG_OMAP2_DSS_FAKE_VSYNC + dispc_fake_vsync_irq(); +#endif +} + +static int dsi_update_thread(void *data) +{ + unsigned long timeout; + struct omap_dss_device *device; + u16 x, y, w, h; + + while (1) { + bool sched; + + wait_event_interruptible(dsi.waitqueue, + dsi.update_mode == OMAP_DSS_UPDATE_AUTO || + (dsi.update_mode == OMAP_DSS_UPDATE_MANUAL && + dsi.update_region.dirty == true) || + kthread_should_stop()); + + if (kthread_should_stop()) + break; + + dsi_bus_lock(); + + if (dsi.update_mode == OMAP_DSS_UPDATE_DISABLED || + kthread_should_stop()) { + dsi_bus_unlock(); + break; + } + + dsi_perf_mark_setup(); + + if (dsi.update_region.dirty) { + spin_lock(&dsi.update_lock); + dsi.active_update_region = dsi.update_region; + dsi.update_region.dirty = false; + spin_unlock(&dsi.update_lock); + } + + device = dsi.active_update_region.device; + x = dsi.active_update_region.x; + y = dsi.active_update_region.y; + w = dsi.active_update_region.w; + h = dsi.active_update_region.h; + + if (device->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) { + + if (dsi.update_mode == OMAP_DSS_UPDATE_MANUAL) { + dss_setup_partial_planes(device, + &x, &y, &w, &h); +#if 1 + /* XXX there seems to be a bug in this driver + * or OMAP hardware. Some updates with certain + * widths and x coordinates fail. These widths + * are always odd, so "fix" it here for now */ + if (w & 1) { + u16 dw, dh; + device->get_resolution(device, + &dw, &dh); + if (x + w == dw) + x &= ~1; + ++w; + + dss_setup_partial_planes(device, + &x, &y, &w, &h); + } +#endif + } + + dispc_set_lcd_size(w, h); + } + + if (dsi.active_update_region.dirty) { + dsi.active_update_region.dirty = false; + /* XXX TODO we don't need to send the coords, if they + * are the same that are already programmed to the + * panel. That should speed up manual update a bit */ + device->driver->setup_update(device, x, y, w, h); + } + + dsi_perf_mark_start(); + + if (device->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) { + dsi_vc_config_vp(0); + + if (dsi.te_enabled && dsi.use_ext_te) + device->driver->wait_for_te(device); + + dsi.framedone_received = false; + + dsi_update_screen_dispc(device, x, y, w, h); + + /* wait for framedone */ + timeout = msecs_to_jiffies(1000); + timeout = wait_event_timeout(dsi.waitqueue, + dsi.framedone_received == true, + timeout); + + if (timeout == 0) { + DSSERR("framedone timeout\n"); + DSSERR("failed update %d,%d %dx%d\n", + x, y, w, h); + + dispc_enable_sidle(); + dispc_enable_lcd_out(0); + } else { + dsi_handle_framedone(); + dsi_perf_show("DISPC"); + } + } else { + dsi_update_screen_l4(device, x, y, w, h); + dsi_perf_show("L4"); + } + + sched = atomic_read(&dsi.bus_lock.count) < 0; + + complete_all(&dsi.update_completion); + + dsi_bus_unlock(); + + /* XXX We need to give others chance to get the bus lock. Is + * there a better way for this? */ + if (dsi.update_mode == OMAP_DSS_UPDATE_AUTO && sched) + schedule_timeout_interruptible(1); + } + + DSSDBG("update thread exiting\n"); + + return 0; +} + + + +/* Display funcs */ + +static int dsi_display_init_dispc(struct omap_dss_device *dssdev) +{ + int r; + + r = omap_dispc_register_isr(dsi_framedone_irq_callback, NULL, + DISPC_IRQ_FRAMEDONE); + if (r) { + DSSERR("can't get FRAMEDONE irq\n"); + return r; + } + + dispc_set_lcd_display_type(OMAP_DSS_LCD_DISPLAY_TFT); + + dispc_set_parallel_interface_mode(OMAP_DSS_PARALLELMODE_DSI); + dispc_enable_fifohandcheck(1); + + dispc_set_tft_data_lines(dssdev->ctrl.pixel_size); + + { + struct omap_video_timings timings = { + .hsw = 1, + .hfp = 1, + .hbp = 1, + .vsw = 1, + .vfp = 0, + .vbp = 0, + }; + + dispc_set_lcd_timings(&timings); + } + + return 0; +} + +static void dsi_display_uninit_dispc(struct omap_dss_device *dssdev) +{ + omap_dispc_unregister_isr(dsi_framedone_irq_callback, NULL, + DISPC_IRQ_FRAMEDONE); +} + +static int dsi_display_init_dsi(struct omap_dss_device *dssdev) +{ + struct dsi_clock_info cinfo; + int r; + + _dsi_print_reset_status(); + + r = dsi_pll_init(1, 0); + if (r) + goto err0; + + r = dsi_pll_calc_ddrfreq(dssdev->phy.dsi.ddr_clk_hz, &cinfo); + if (r) + goto err1; + + r = dsi_pll_program(&cinfo); + if (r) + goto err1; + + DSSDBG("PLL OK\n"); + + r = dsi_complexio_init(dssdev); + if (r) + goto err1; + + _dsi_print_reset_status(); + + dsi_proto_timings(dssdev); + dsi_set_lp_clk_divisor(dssdev); + + if (1) + _dsi_print_reset_status(); + + r = dsi_proto_config(dssdev); + if (r) + goto err2; + + /* enable interface */ + dsi_vc_enable(0, 1); + dsi_if_enable(1); + dsi_force_tx_stop_mode_io(); + + if (dssdev->driver->enable) { + r = dssdev->driver->enable(dssdev); + if (r) + goto err3; + } + + /* enable high-speed after initial config */ + dsi_vc_enable_hs(0, 1); + + return 0; +err3: + dsi_if_enable(0); +err2: + dsi_complexio_uninit(); +err1: + dsi_pll_uninit(); +err0: + return r; +} + +static void dsi_display_uninit_dsi(struct omap_dss_device *dssdev) +{ + if (dssdev->driver->disable) + dssdev->driver->disable(dssdev); + + dsi_complexio_uninit(); + dsi_pll_uninit(); +} + +static int dsi_core_init(void) +{ + /* Autoidle */ + REG_FLD_MOD(DSI_SYSCONFIG, 1, 0, 0); + + /* ENWAKEUP */ + REG_FLD_MOD(DSI_SYSCONFIG, 1, 2, 2); + + /* SIDLEMODE smart-idle */ + REG_FLD_MOD(DSI_SYSCONFIG, 2, 4, 3); + + _dsi_initialize_irq(); + + return 0; +} + +static int dsi_display_enable(struct omap_dss_device *dssdev) +{ + int r = 0; + + DSSDBG("dsi_display_enable\n"); + + mutex_lock(&dsi.lock); + dsi_bus_lock(); + + r = omap_dss_start_device(dssdev); + if (r) { + DSSERR("failed to start device\n"); + goto err0; + } + + if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) { + DSSERR("dssdev already enabled\n"); + r = -EINVAL; + goto err1; + } + + enable_clocks(1); + dsi_enable_pll_clock(1); + + r = _dsi_reset(); + if (r) + goto err2; + + dsi_core_init(); + + r = dsi_display_init_dispc(dssdev); + if (r) + goto err2; + + r = dsi_display_init_dsi(dssdev); + if (r) + goto err3; + + dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; + + dsi.use_ext_te = dssdev->phy.dsi.ext_te; + r = dsi_set_te(dssdev, dsi.te_enabled); + if (r) + goto err3; + + dsi.update_mode = dsi.user_update_mode; + if (dsi.update_mode == OMAP_DSS_UPDATE_AUTO) + dsi_start_auto_update(dssdev); + + dsi_bus_unlock(); + mutex_unlock(&dsi.lock); + + return 0; + +err3: + dsi_display_uninit_dispc(dssdev); +err2: + enable_clocks(0); + dsi_enable_pll_clock(0); +err1: + omap_dss_stop_device(dssdev); +err0: + dsi_bus_unlock(); + mutex_unlock(&dsi.lock); + DSSDBG("dsi_display_enable FAILED\n"); + return r; +} + +static void dsi_display_disable(struct omap_dss_device *dssdev) +{ + DSSDBG("dsi_display_disable\n"); + + mutex_lock(&dsi.lock); + dsi_bus_lock(); + + if (dssdev->state == OMAP_DSS_DISPLAY_DISABLED || + dssdev->state == OMAP_DSS_DISPLAY_SUSPENDED) + goto end; + + dsi.update_mode = OMAP_DSS_UPDATE_DISABLED; + dssdev->state = OMAP_DSS_DISPLAY_DISABLED; + + dsi_display_uninit_dispc(dssdev); + + dsi_display_uninit_dsi(dssdev); + + enable_clocks(0); + dsi_enable_pll_clock(0); + + omap_dss_stop_device(dssdev); +end: + dsi_bus_unlock(); + mutex_unlock(&dsi.lock); +} + +static int dsi_display_suspend(struct omap_dss_device *dssdev) +{ + DSSDBG("dsi_display_suspend\n"); + + mutex_lock(&dsi.lock); + dsi_bus_lock(); + + if (dssdev->state == OMAP_DSS_DISPLAY_DISABLED || + dssdev->state == OMAP_DSS_DISPLAY_SUSPENDED) + goto end; + + dsi.update_mode = OMAP_DSS_UPDATE_DISABLED; + dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED; + + dsi_display_uninit_dispc(dssdev); + + dsi_display_uninit_dsi(dssdev); + + enable_clocks(0); + dsi_enable_pll_clock(0); +end: + dsi_bus_unlock(); + mutex_unlock(&dsi.lock); + + return 0; +} + +static int dsi_display_resume(struct omap_dss_device *dssdev) +{ + int r; + + DSSDBG("dsi_display_resume\n"); + + mutex_lock(&dsi.lock); + dsi_bus_lock(); + + if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) { + DSSERR("dssdev not suspended\n"); + r = -EINVAL; + goto err0; + } + + enable_clocks(1); + dsi_enable_pll_clock(1); + + r = _dsi_reset(); + if (r) + goto err1; + + dsi_core_init(); + + r = dsi_display_init_dispc(dssdev); + if (r) + goto err1; + + r = dsi_display_init_dsi(dssdev); + if (r) + goto err2; + + dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; + + r = dsi_set_te(dssdev, dsi.te_enabled); + if (r) + goto err2; + + dsi.update_mode = dsi.user_update_mode; + if (dsi.update_mode == OMAP_DSS_UPDATE_AUTO) + dsi_start_auto_update(dssdev); + + dsi_bus_unlock(); + mutex_unlock(&dsi.lock); + + return 0; + +err2: + dsi_display_uninit_dispc(dssdev); +err1: + enable_clocks(0); + dsi_enable_pll_clock(0); +err0: + dsi_bus_unlock(); + mutex_unlock(&dsi.lock); + DSSDBG("dsi_display_resume FAILED\n"); + return r; +} + +static int dsi_display_update(struct omap_dss_device *dssdev, + u16 x, u16 y, u16 w, u16 h) +{ + int r = 0; + u16 dw, dh; + + DSSDBG("dsi_display_update(%d,%d %dx%d)\n", x, y, w, h); + + mutex_lock(&dsi.lock); + + if (dsi.update_mode != OMAP_DSS_UPDATE_MANUAL) + goto end; + + if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) + goto end; + + dssdev->get_resolution(dssdev, &dw, &dh); + + if (x > dw || y > dh) + goto end; + + if (x + w > dw) + w = dw - x; + + if (y + h > dh) + h = dh - y; + + if (w == 0 || h == 0) + goto end; + + dsi_set_update_region(dssdev, x, y, w, h); + + wake_up(&dsi.waitqueue); + +end: + mutex_unlock(&dsi.lock); + + return r; +} + +static int dsi_display_sync(struct omap_dss_device *dssdev) +{ + bool wait; + + DSSDBG("dsi_display_sync()\n"); + + mutex_lock(&dsi.lock); + dsi_bus_lock(); + + if (dsi.update_mode == OMAP_DSS_UPDATE_MANUAL && + dsi.update_region.dirty) { + INIT_COMPLETION(dsi.update_completion); + wait = true; + } else { + wait = false; + } + + dsi_bus_unlock(); + mutex_unlock(&dsi.lock); + + if (wait) + wait_for_completion_interruptible(&dsi.update_completion); + + DSSDBG("dsi_display_sync() done\n"); + return 0; +} + +static int dsi_display_set_update_mode(struct omap_dss_device *dssdev, + enum omap_dss_update_mode mode) +{ + DSSDBGF("%d", mode); + + mutex_lock(&dsi.lock); + dsi_bus_lock(); + + if (dsi.update_mode != mode) { + dsi.user_update_mode = mode; + dsi.update_mode = mode; + + if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE && + mode == OMAP_DSS_UPDATE_AUTO) + dsi_start_auto_update(dssdev); + } + + dsi_bus_unlock(); + mutex_unlock(&dsi.lock); + + return 0; +} + +static enum omap_dss_update_mode dsi_display_get_update_mode( + struct omap_dss_device *dssdev) +{ + return dsi.update_mode; +} + + +static int dsi_display_enable_te(struct omap_dss_device *dssdev, bool enable) +{ + int r = 0; + + DSSDBGF("%d", enable); + + if (!dssdev->driver->enable_te) + return -ENOENT; + + dsi_bus_lock(); + + dsi.te_enabled = enable; + + if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) + goto end; + + r = dsi_set_te(dssdev, enable); +end: + dsi_bus_unlock(); + + return r; +} + +static int dsi_display_get_te(struct omap_dss_device *dssdev) +{ + return dsi.te_enabled; +} + +static int dsi_display_set_rotate(struct omap_dss_device *dssdev, u8 rotate) +{ + + DSSDBGF("%d", rotate); + + if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate) + return -EINVAL; + + dsi_bus_lock(); + dssdev->driver->set_rotate(dssdev, rotate); + if (dsi.update_mode == OMAP_DSS_UPDATE_AUTO) { + u16 w, h; + /* the display dimensions may have changed, so set a new + * update region */ + dssdev->get_resolution(dssdev, &w, &h); + dsi_set_update_region(dssdev, 0, 0, w, h); + } + dsi_bus_unlock(); + + return 0; +} + +static u8 dsi_display_get_rotate(struct omap_dss_device *dssdev) +{ + if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate) + return 0; + + return dssdev->driver->get_rotate(dssdev); +} + +static int dsi_display_set_mirror(struct omap_dss_device *dssdev, bool mirror) +{ + DSSDBGF("%d", mirror); + + if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror) + return -EINVAL; + + dsi_bus_lock(); + dssdev->driver->set_mirror(dssdev, mirror); + dsi_bus_unlock(); + + return 0; +} + +static bool dsi_display_get_mirror(struct omap_dss_device *dssdev) +{ + if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror) + return 0; + + return dssdev->driver->get_mirror(dssdev); +} + +static int dsi_display_run_test(struct omap_dss_device *dssdev, int test_num) +{ + int r; + + if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) + return -EIO; + + DSSDBGF("%d", test_num); + + dsi_bus_lock(); + + /* run test first in low speed mode */ + dsi_vc_enable_hs(0, 0); + + if (dssdev->driver->run_test) { + r = dssdev->driver->run_test(dssdev, test_num); + if (r) + goto end; + } + + /* then in high speed */ + dsi_vc_enable_hs(0, 1); + + if (dssdev->driver->run_test) { + r = dssdev->driver->run_test(dssdev, test_num); + if (r) + goto end; + } + +end: + dsi_vc_enable_hs(0, 1); + + dsi_bus_unlock(); + + return r; +} + +static int dsi_display_memory_read(struct omap_dss_device *dssdev, + void *buf, size_t size, + u16 x, u16 y, u16 w, u16 h) +{ + int r; + + DSSDBGF(""); + + if (!dssdev->driver->memory_read) + return -EINVAL; + + if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) + return -EIO; + + dsi_bus_lock(); + + r = dssdev->driver->memory_read(dssdev, buf, size, + x, y, w, h); + + dsi_bus_unlock(); + + return r; +} + +void dsi_get_overlay_fifo_thresholds(enum omap_plane plane, + u32 fifo_size, enum omap_burst_size *burst_size, + u32 *fifo_low, u32 *fifo_high) +{ + unsigned burst_size_bytes; + + *burst_size = OMAP_DSS_BURST_16x32; + burst_size_bytes = 16 * 32 / 8; + + *fifo_high = fifo_size - burst_size_bytes; + *fifo_low = 0; +} + +int dsi_init_display(struct omap_dss_device *dssdev) +{ + DSSDBG("DSI init\n"); + + dssdev->enable = dsi_display_enable; + dssdev->disable = dsi_display_disable; + dssdev->suspend = dsi_display_suspend; + dssdev->resume = dsi_display_resume; + dssdev->update = dsi_display_update; + dssdev->sync = dsi_display_sync; + dssdev->set_update_mode = dsi_display_set_update_mode; + dssdev->get_update_mode = dsi_display_get_update_mode; + dssdev->enable_te = dsi_display_enable_te; + dssdev->get_te = dsi_display_get_te; + + dssdev->get_rotate = dsi_display_get_rotate; + dssdev->set_rotate = dsi_display_set_rotate; + + dssdev->get_mirror = dsi_display_get_mirror; + dssdev->set_mirror = dsi_display_set_mirror; + + dssdev->run_test = dsi_display_run_test; + dssdev->memory_read = dsi_display_memory_read; + + dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE; + + dsi.vc[0].dssdev = dssdev; + dsi.vc[1].dssdev = dssdev; + + return 0; +} + +int dsi_init(struct platform_device *pdev) +{ + u32 rev; + struct sched_param param = { + .sched_priority = MAX_USER_RT_PRIO-1 + }; + + spin_lock_init(&dsi.errors_lock); + dsi.errors = 0; + + /* XXX fail properly */ + + init_completion(&dsi.bta_completion); + init_completion(&dsi.update_completion); + + dsi.thread = kthread_create(dsi_update_thread, NULL, "dsi"); + if (IS_ERR(dsi.thread)) { + DSSERR("cannot create kthread\n"); + return PTR_ERR(dsi.thread); + } + sched_setscheduler(dsi.thread, SCHED_FIFO, ¶m); + + init_waitqueue_head(&dsi.waitqueue); + spin_lock_init(&dsi.update_lock); + + mutex_init(&dsi.lock); + mutex_init(&dsi.bus_lock); + + dsi.update_mode = OMAP_DSS_UPDATE_DISABLED; + dsi.user_update_mode = OMAP_DSS_UPDATE_DISABLED; + + dsi.base = ioremap(DSI_BASE, DSI_SZ_REGS); + if (!dsi.base) { + DSSERR("can't ioremap DSI\n"); + return -ENOMEM; + } + + dsi.vdds_dsi_reg = regulator_get(&pdev->dev, "vdds_dsi"); + if (IS_ERR(dsi.vdds_dsi_reg)) { + iounmap(dsi.base); + DSSERR("can't get VDDS_DSI regulator\n"); + return PTR_ERR(dsi.vdds_dsi_reg); + } + + enable_clocks(1); + + rev = dsi_read_reg(DSI_REVISION); + printk(KERN_INFO "OMAP DSI rev %d.%d\n", + FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0)); + + enable_clocks(0); + + wake_up_process(dsi.thread); + + return 0; +} + +void dsi_exit(void) +{ + kthread_stop(dsi.thread); + + regulator_put(dsi.vdds_dsi_reg); + + iounmap(dsi.base); + + DSSDBG("omap_dsi_exit\n"); +} + -- 1.6.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
