this driver provides support for Alcor Micro AU6601 and AU6621
Signed-off-by: Oleksij Rempel <linux@xxxxxxxxxxxxxxxx>
---
drivers/mmc/host/Kconfig | 9 +
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/au6601.c | 1744 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 1754 insertions(+)
create mode 100644 drivers/mmc/host/au6601.c
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 9589f9c9046f..7112d1fbba6d 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -421,6 +421,15 @@ config MMC_WBSD
If unsure, say N.
+config MMC_AU6601
+ tristate "Alcor Micro AU6601"
+ depends on PCI
+ help
+ This selects the Alcor Micro Multimedia card interface.
+
+ If unsure, say N.
+
+
config MMC_AU1X
tristate "Alchemy AU1XX0 MMC Card Interface support"
depends on MIPS_ALCHEMY
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 6aead24879b4..b8d4271e7b29 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_MMC_SDHCI_F_SDH30) += sdhci_f_sdh30.o
obj-$(CONFIG_MMC_SDHCI_SPEAR) += sdhci-spear.o
obj-$(CONFIG_MMC_WBSD) += wbsd.o
obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
+obj-$(CONFIG_MMC_AU6601) += au6601.o
obj-$(CONFIG_MMC_MTK) += mtk-sd.o
obj-$(CONFIG_MMC_OMAP) += omap.o
obj-$(CONFIG_MMC_OMAP_HS) += omap_hsmmc.o
diff --git a/drivers/mmc/host/au6601.c b/drivers/mmc/host/au6601.c
new file mode 100644
index 000000000000..d9e2c0fc4ef8
--- /dev/null
+++ b/drivers/mmc/host/au6601.c
@@ -0,0 +1,1744 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Oleksij Rempel <linux@xxxxxxxxxxxxxxxx>
+ *
+ * Direver for Alcor Micro AU6601 and AU6621 controllers
+ */
+
+
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/pm.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+
+#define DRVNAME "au6601-pci"
+#define PCI_ID_ALCOR_MICRO 0x1AEA
+#define PCI_ID_AU6601 0x6601
+#define PCI_ID_AU6621 0x6621
+
+#define MHZ_TO_HZ(freq) ((freq) * 1000 * 1000)
+
+#define AU6601_BASE_CLOCK MHZ_TO_HZ(31)
+#define AU6601_MIN_CLOCK (150 * 1000)
+#define AU6601_MAX_CLOCK MHZ_TO_HZ(208)
+#define AU6601_MAX_DMA_SEGMENTS (8 * 120)
+#define AU6601_MAX_PIO_SEGMENTS 1
+#define AU6601_MAX_DMA_BLOCK_SIZE 0x1000
+#define AU6601_MAX_PIO_BLOCK_SIZE 0x200
+#define AU6601_MAX_DMA_BLOCKS 1
+#define AU6601_DMA_LOCAL_SEGMENTS 1
+
+/* SDMA phy address. Higer then 0x0800.0000?
+ * The au6601 and au6621 have different DMA engines with different issues. One
+ * For example au6621 engine is triggered by addr change. No other interaction
+ * is needed. This means, if we get two buffers with same address, then engine
+ * will stall.
+ */
+#define AU6601_REG_SDMA_ADDR 0x00
+#define AU6601_SDMA_MASK 0xffffffff
+
+#define AU6601_DMA_BOUNDARY 0x05
+#define AU6621_DMA_PAGE_CNT 0x05
+/* PIO */
+#define AU6601_REG_BUFFER 0x08
+/* ADMA ctrl? AU6621 only. */
+#define AU6621_DMA_CTRL 0x0c
+#define AU6621_DMA_ENABLE BIT(0)
+/* ADMA phy address. AU6621 only. */
+#define REG_10 0x10
+/* CMD index */
+#define AU6601_REG_CMD_OPCODE 0x23
+/* CMD parametr */
+#define AU6601_REG_CMD_ARG 0x24
+/* CMD response 4x4 Bytes */
+#define AU6601_REG_CMD_RSP0 0x30
+#define AU6601_REG_CMD_RSP1 0x34
+#define AU6601_REG_CMD_RSP2 0x38
+#define AU6601_REG_CMD_RSP3 0x3C
+/* LED ctrl? */
+#define REG_51 0x51
+/* ??? */
+#define REG_52 0x52
+/* LED related? Always toggled BIT0 */
+#define REG_61 0x61
+/* Same as REG_61? */
+#define REG_63 0x63
+/* default timeout set to 125: 125 * 40ms = 5 sec
+ * how exactly it is calculated? */
+#define AU6601_TIME_OUT_CTRL 0x69
+/* Block size for SDMA or PIO */
+#define AU6601_REG_BLOCK_SIZE 0x6c
+/* Some power related reg, used together with AU6601_OUTPUT_ENABLE */
+#define AU6601_POWER_CONTROL 0x70
+
+
+/* PLL ctrl */
+#define AU6601_CLK_SELECT 0x72
+#define AU6601_CLK_OVER_CLK 0x80
+#define AU6601_CLK_384_MHZ 0x30
+#define AU6601_CLK_125_MHZ 0x20
+#define AU6601_CLK_48_MHZ 0x10
+#define AU6601_CLK_EXT_PLL 0x04
+#define AU6601_CLK_X2_MODE 0x02
+#define AU6601_CLK_ENABLE 0x01
+#define AU6601_CLK_31_25_MHZ 0x00
+
+#define AU6601_CLK_DIVIDER 0x73
+
+#define AU6601_INTERFACE_MODE_CTRL 0x74
+#define AU6601_DLINK_MODE 0x80
+#define AU6601_INTERRUPT_DELAY_TIME 0x40
+#define AU6601_SIGNAL_REQ_CTRL 0x30
+#define AU6601_MS_CARD_WP BIT(3)
+#define AU6601_SD_CARD_WP BIT(0)
+
+/* ???
+ * same register values are used for:
+ * - AU6601_OUTPUT_ENABLE
+ * - AU6601_POWER_CONTROL
+ */
+#define AU6601_ACTIVE_CTRL 0x75
+#define AU6601_XD_CARD BIT(4)
+/* AU6601_MS_CARD_ACTIVE - will cativate MS card section? */
+#define AU6601_MS_CARD BIT(3)
+#define AU6601_SD_CARD BIT(0)
+
+/* card slot state. It should automatically detect type of
+ * the card
+ */
+#define AU6601_DETECT_STATUS 0x76
+#define AU6601_DETECT_EN BIT(7)
+#define AU6601_MS_DETECTED BIT(3)
+#define AU6601_SD_DETECTED BIT(0)
+#define AU6601_DETECT_STATUS_M 0xf
+/* ??? */
+#define REG_77 0x77
+/* looks like soft reset? */
+#define AU6601_REG_SW_RESET 0x79
+#define AU6601_BUF_CTRL_RESET BIT(7)
+#define AU6601_RESET_DATA BIT(3)
+#define AU6601_RESET_CMD BIT(0)
+
+#define AU6601_OUTPUT_ENABLE 0x7a
+
+#define AU6601_PAD_DRIVE0 0x7b
+#define AU6601_PAD_DRIVE1 0x7c
+#define AU6601_PAD_DRIVE2 0x7d
+/* read EEPROM? */
+#define AU6601_FUNCTION 0x7f
+
+#define AU6601_CMD_XFER_CTRL 0x81
+#define AU6601_CMD_17_BYTE_CRC 0xc0
+#define AU6601_CMD_6_BYTE_WO_CRC 0x80
+#define AU6601_CMD_6_BYTE_CRC 0x40
+#define AU6601_CMD_START_XFER 0x20
+#define AU6601_CMD_STOP_WAIT_RDY 0x10
+#define AU6601_CMD_NO_RESP 0x00
+
+#define AU6601_REG_BUS_CTRL 0x82
+#define AU6601_BUS_WIDTH_4BIT 0x20
+#define AU6601_BUS_WIDTH_8BIT 0x10
+#define AU6601_BUS_WIDTH_1BIT 0x00
+
+#define AU6601_DATA_XFER_CTRL 0x83
+#define AU6601_DATA_WRITE BIT(7)
+#define AU6601_DATA_DMA_MODE BIT(6)
+#define AU6601_DATA_START_XFER BIT(0)
+
+#define AU6601_DATA_PIN_STATE 0x84
+#define AU6601_BUS_STAT_CMD BIT(15)
+/* BIT(4) - BIT(7) are permanently 1.
+ * May be reseved or not attached DAT4-DAT7 */
+#define AU6601_BUS_STAT_DAT3 BIT(3)
+#define AU6601_BUS_STAT_DAT2 BIT(2)
+#define AU6601_BUS_STAT_DAT1 BIT(1)
+#define AU6601_BUS_STAT_DAT0 BIT(0)
+#define AU6601_BUS_STAT_DAT_MASK 0xf
+
+#define AU6601_OPT 0x85
+#define AU6601_OPT_CMD_LINE_LEVEL 0x80
+#define AU6601_OPT_NCRC_16_CLK BIT(4)
+#define AU6601_OPT_CMD_NWT BIT(3)
+#define AU6601_OPT_STOP_CLK BIT(2)
+#define AU6601_OPT_DDR_MODE BIT(1)
+#define AU6601_OPT_SD_18V BIT(0)
+
+#define AU6601_CLK_DELAY 0x86
+#define AU6601_CLK_DATA_POSITIVE_EDGE 0x80
+#define AU6601_CLK_CMD_POSITIVE_EDGE 0x40
+#define AU6601_CLK_POSITIVE_EDGE_ALL \
+ AU6601_CLK_CMD_POSITIVE_EDGE | AU6601_CLK_DATA_POSITIVE_EDGE
+
+
+#define AU6601_REG_INT_STATUS 0x90
+#define AU6601_REG_INT_ENABLE 0x94
+#define AU6601_INT_DATA_END_BIT_ERR BIT(22)
+#define AU6601_INT_DATA_CRC_ERR BIT(21)
+#define AU6601_INT_DATA_TIMEOUT_ERR BIT(20)
+#define AU6601_INT_CMD_INDEX_ERR BIT(19)
+#define AU6601_INT_CMD_END_BIT_ERR BIT(18)
+#define AU6601_INT_CMD_CRC_ERR BIT(17)
+#define AU6601_INT_CMD_TIMEOUT_ERR BIT(16)
+#define AU6601_INT_ERROR BIT(15)
+#define AU6601_INT_OVER_CURRENT_ERR BIT(8)
+#define AU6601_INT_CARD_INSERT BIT(7)
+#define AU6601_INT_CARD_REMOVE BIT(6)
+#define AU6601_INT_READ_BUF_RDY BIT(5)
+#define AU6601_INT_WRITE_BUF_RDY BIT(4)
+#define AU6601_INT_DMA_END BIT(3)
+#define AU6601_INT_DATA_END BIT(1)
+#define AU6601_INT_CMD_END BIT(0)
+
+#define AU6601_INT_NORMAL_MASK 0x00007FFF
+#define AU6601_INT_ERROR_MASK 0xFFFF8000
+
+#define AU6601_INT_CMD_MASK (AU6601_INT_CMD_END | \
+ AU6601_INT_CMD_TIMEOUT_ERR | AU6601_INT_CMD_CRC_ERR | \
+ AU6601_INT_CMD_END_BIT_ERR | AU6601_INT_CMD_INDEX_ERR)
+#define AU6601_INT_DATA_MASK (AU6601_INT_DATA_END | AU6601_INT_DMA_END | \
+ AU6601_INT_READ_BUF_RDY | AU6601_INT_WRITE_BUF_RDY | \
+ AU6601_INT_DATA_TIMEOUT_ERR | AU6601_INT_DATA_CRC_ERR | \
+ AU6601_INT_DATA_END_BIT_ERR)
+#define AU6601_INT_ALL_MASK ((u32)-1)
+
+/* MS_CARD mode registers */
+
+#define AU6601_MS_STATUS 0xa0
+
+#define AU6601_MS_BUS_MODE_CTRL 0xa1
+#define AU6601_MS_BUS_8BIT_MODE 0x03
+#define AU6601_MS_BUS_4BIT_MODE 0x01
+#define AU6601_MS_BUS_1BIT_MODE 0x00
+
+#define AU6601_MS_TPC_CMD 0xa2
+#define AU6601_MS_TPC_READ_PAGE_DATA 0x02
+#define AU6601_MS_TPC_READ_REG 0x04
+#define AU6601_MS_TPC_GET_INT 0x07
+#define AU6601_MS_TPC_WRITE_PAGE_DATA 0x0D
+#define AU6601_MS_TPC_WRITE_REG 0x0B
+#define AU6601_MS_TPC_SET_RW_REG_ADRS 0x08
+#define AU6601_MS_TPC_SET_CMD 0x0E
+#define AU6601_MS_TPC_EX_SET_CMD 0x09
+#define AU6601_MS_TPC_READ_SHORT_DATA 0x03
+#define AU6601_MS_TPC_WRITE_SHORT_DATA 0x0C
+
+#define AU6601_MS_TRANSFER_MODE 0xa3
+#define AU6601_MS_XFER_INT_TIMEOUT_CHK BIT(2)
+#define AU6601_MS_XFER_DMA_ENABLE BIT(1)
+#define AU6601_MS_XFER_START BIT(0)
+
+#define AU6601_MS_DATA_PIN_STATE 0xa4
+
+#define AU6601_MS_INT_STATUS 0xb0
+#define AU6601_MS_INT_ENABLE 0xb4
+#define AU6601_MS_INT_OVER_CURRENT_ERROR BIT(23)
+#define AU6601_MS_INT_DATA_CRC_ERROR BIT(21)
+#define AU6601_MS_INT_INT_TIMEOUT BIT(20)
+#define AU6601_MS_INT_INT_RESP_ERROR BIT(19)
+#define AU6601_MS_INT_CED_ERROR BIT(18)
+#define AU6601_MS_INT_TPC_TIMEOUT BIT(16)
+#define AU6601_MS_INT_ERROR BIT(15)
+#define AU6601_MS_INT_CARD_INSERT BIT(7)
+#define AU6601_MS_INT_CARD_REMOVE BIT(6)
+#define AU6601_MS_INT_BUF_READ_RDY BIT(5)
+#define AU6601_MS_INT_BUF_WRITE_RDY BIT(4)
+#define AU6601_MS_INT_DMA_END BIT(3)
+#define AU6601_MS_INT_TPC_END BIT(1)
+
+#define AU6601_MS_INT_DATA_MASK 0x00000038
+#define AU6601_MS_INT_TPC_MASK 0x003d8002
+#define AU6601_MS_INT_TPC_ERROR 0x003d0000
+
+static unsigned use_dma = 1;
+module_param(use_dma, uint, 0);
+MODULE_PARM_DESC(use_dma, "Whether to use DMA or not. Default = 1");
+
+enum au6601_cookie {
+ COOKIE_UNMAPPED,
+ COOKIE_PRE_MAPPED, /* mapped by pre_req() of dwmmc */
+ COOKIE_MAPPED, /* mapped by prepare_data() of dwmmc */
+};
+
+struct au6601_dev_cfg {
+ u32 flags;
+ u8 dma;
+};
+
+struct au6601_pll_conf {
+ unsigned int clk_src_freq;
+ unsigned int clk_src_reg;
+ unsigned int min_div;
+ unsigned int max_div;
+};
+
+struct au6601_host {
+ struct pci_dev *pdev;
+ struct pci_dev *parent_pdev;
+ struct device *dev;
+ void __iomem *iobase;
+ void __iomem *dma_trap_virt;
+ dma_addr_t dma_trap_phys;
+
+ struct mmc_host *mmc;
+ struct mmc_request *mrq;
+ struct mmc_command *cmd;
+ struct mmc_data *data;
+ unsigned int dma_on:1;
+ unsigned int early_data:1;
+ bool use_dma;
+
+ struct mutex cmd_mutex;
+ spinlock_t lock;
+
+ struct delayed_work timeout_work;
+
+ struct sg_mapping_iter sg_miter; /* SG state for PIO */
+ struct scatterlist *sg;
+ unsigned int blocks; /* remaining PIO blocks */
+ int sg_count;
+
+ u32 irq_status_sd;
+ struct au6601_dev_cfg *cfg;
+ unsigned char cur_power_mode;
+ unsigned char cur_bus_mode;
+
+ /* aspm section */
+ int pdev_cap_off;
+ u8 pdev_aspm_cap;
+ int parent_cap_off;
+ u8 parent_aspm_cap;
+ u8 ext_config_dev_aspm;
+};
+
+static const struct au6601_pll_conf au6601_pll_cfg[] = {
+ /* MHZ, CLK src, max div, min div */
+ { 31250000, AU6601_CLK_31_25_MHZ, 1, 511},
+ { 48000000, AU6601_CLK_48_MHZ, 1, 511},
+ {125000000, AU6601_CLK_125_MHZ, 1, 511},
+ {384000000, AU6601_CLK_384_MHZ, 1, 511},
+};
+
+static void au6601_send_cmd(struct au6601_host *host,
+ struct mmc_command *cmd);
+
+static void au6601_prepare_data(struct au6601_host *host,
+ struct mmc_command *cmd);
+static void au6601_finish_data(struct au6601_host *host);
+static void au6601_request_complete(struct au6601_host *host,
+ bool cancel_timeout);
+static int au6601_get_cd(struct mmc_host *mmc);
+
+static const struct au6601_dev_cfg au6601_cfg = {
+ .dma = 0,
+};
+
+static const struct au6601_dev_cfg au6621_cfg = {
+ .dma = 1,
+};
+
+static const struct pci_device_id pci_ids[] = {
+ { PCI_DEVICE(PCI_ID_ALCOR_MICRO, PCI_ID_AU6601),
+ .driver_data = (kernel_ulong_t)&au6601_cfg },
+ { PCI_DEVICE(PCI_ID_ALCOR_MICRO, PCI_ID_AU6621),
+ .driver_data = (kernel_ulong_t)&au6621_cfg },
+ { },
+};
+MODULE_DEVICE_TABLE(pci, pci_ids);
+
+static void au6601_reg_decode(int write, int size, u32 val,
+ unsigned int addr_short)
+{
+ const char *reg;
+
+ switch (addr_short)
+ {
+ case 0x00: reg = "SDMA_ADDR"; break;
+ case 0x05: reg = "DMA_BOUNDARY"; break;
+ case 0x08: reg = "PIO_BUFFER"; break;
+ case 0x0c: reg = "DMA_CTRL"; break;
+ case 0x23: reg = "CMD_OPCODE"; break;
+ case 0x24: reg = "CMD_ARG"; break;
+ case 0x30: reg = "CMD_RSP0"; break;
+ case 0x34: reg = "CMD_RSP1"; break;
+ case 0x38: reg = "CMD_RSP2"; break;
+ case 0x3C: reg = "CMD_RSP3"; break;
+ case 0x69: reg = "TIME_OUT_CTRL"; break;
+ case 0x6c: reg = "BLOCK_SIZE"; break;
+ case 0x70: reg = "POWER_CONTROL"; break;
+ case 0x72: reg = "CLK_SELECT"; break;
+ case 0x73: reg = "CLK_DIVIDER"; break;
+ case 0x74: reg = "INTERFACE_MODE_CTRL"; break;
+ case 0x75: reg = "ACTIVE_CTRL"; break;
+ case 0x76: reg = "DETECT_STATUS"; break;
+ case 0x79: reg = "SW_RESE"; break;
+ case 0x7a: reg = "OUTPUT_ENABLE"; break;
+ case 0x7b: reg = "PAD_DRIVE0"; break;
+ case 0x7c: reg = "PAD_DRIVE1"; break;
+ case 0x7d: reg = "PAD_DRIVE2"; break;
+ case 0x7f: reg = "EEPROM"; break;
+ case 0x81: reg = "CMD_XFER_CTRL"; break;
+ case 0x82: reg = "BUS_CTRL"; break;
+ case 0x83: reg = "DATA_XFER_CTRL"; break;
+ case 0x84: reg = "DATA_PIN_STATE"; break;
+ case 0x85: reg = "OPT"; break;
+ case 0x86: reg = "CLK_DELAY"; break;
+ case 0x90: reg = "INT_STATUS"; break;
+ case 0x94: reg = "INT_ENABLE"; break;
+ case 0xa0: reg = "MS_STATUS"; break;
+ default: reg = "unkn"; break;
+ }
+
+ pr_debug("%s.%i: 0x%02x 0x%08x (%s)\n", write ? "> w" : "< r",
+ size, addr_short, val, reg);
+}
+
+static void au6601_write8(struct au6601_host *host, u8 val,
+ unsigned int addr)
+{
+ au6601_reg_decode(1, 1, val, addr);
+ writeb(val, host->iobase + addr);
+}
+
+static void au6601_write16(struct au6601_host *host, u16 val,
+ unsigned int addr)
+{
+ au6601_reg_decode(1, 2, val, addr);
+ writew(val, host->iobase + addr);
+}
+
+static void au6601_write32(struct au6601_host *host, u32 val,
+ unsigned int addr)
+{
+ au6601_reg_decode(1, 4, val, addr);
+ writel(val, host->iobase + addr);
+}
+
+static u8 au6601_read8(struct au6601_host *host,
+ unsigned int addr)
+{
+ u8 val;
+ val = readb(host->iobase + addr);
+ au6601_reg_decode(0, 1, val, addr);
+ return val;
+}
+
+static u32 au6601_read32(struct au6601_host *host,
+ unsigned int addr)
+{
+ u32 val;
+ val = readl(host->iobase + addr);
+ au6601_reg_decode(0, 4, val, addr);
+ return val;
+}
+
+static u32 au6601_read32be(struct au6601_host *host,
+ unsigned int addr)
+{
+ u32 val;
+ val = ioread32be(host->iobase + addr);
+ au6601_reg_decode(0, 4, val, addr);
+ return val;
+}
+
+static void au6601_write32be(struct au6601_host *host,
+ u32 val, unsigned int addr)
+{
+ au6601_reg_decode(1, 4, val, addr);
+ iowrite32be(val, host->iobase + addr);
+}
+
+static inline void au6601_rmw8(struct au6601_host *host, unsigned int addr,
+ u8 clear, u8 set)
+{
+ u32 var;
+
+ var = au6601_read8(host, addr);
+ var &= ~clear;
+ var |= set;
+ au6601_write8(host, var, addr);
+}
+
+static int pci_find_cap_offset(struct au6601_host *host, struct pci_dev *pci)
+{
+ int where;
+ u8 val8;
+ u32 val32;
+
+#define CAP_START_OFFSET 0x34
+
+ where = CAP_START_OFFSET;
+ pci_read_config_byte(pci, where, &val8);
+ if (!val8) {
+ return 0;
+ }
+
+ where = (int)val8;
+ while (1) {
+ pci_read_config_dword(pci, where, &val32);
+ if (val32 == 0xffffffff) {
+ dev_dbg(host->dev, "pci_find_cap_offset invailid value %x.\n", val32);
+ return 0;
+ }
+
+ if ((val32 & 0xff) == 0x10) {
+ dev_dbg(host->dev, "pcie cap offset: %x\n", where);
+ return where;
+ }
+
+ if ((val32 & 0xff00) == 0x00) {
+ dev_dbg(host->dev, "pci_find_cap_offset invailid value %x.\n", val32);
+ break;
+ }
+ where = (int)((val32 >> 8) & 0xff);
+ }
+
+ return 0;
+}
+
+/* FIXME: return results are currently ignored */
+static int pci_init_check_aspm(struct au6601_host *host)
+{
+#define PCIE_LINK_CAP_OFFSET 0x0c
+
+ struct pci_dev *pci;
+ int where;
+ u32 val32;
+
+ dev_dbg(host->dev, "pci_init_check_aspm\n");
+
+ host->pdev_cap_off = pci_find_cap_offset(host, host->pdev);
+ host->parent_cap_off = pci_find_cap_offset(host, host->parent_pdev);
+
+ if ((host->pdev_cap_off == 0) || (host->parent_cap_off == 0)) {
+ dev_dbg(host->dev, "pci_cap_off: %x, parent_cap_off: %x\n",
+ host->pdev_cap_off, host->parent_cap_off);
+ return 0;
+ }
+
+ /* link capability */
+ pci = host->pdev;
+ where = host->pdev_cap_off + PCIE_LINK_CAP_OFFSET;
+ pci_read_config_dword(pci, where, &val32);
+ host->pdev_aspm_cap = (u8)(val32 >> 10) & 0x03;
+
+ pci = host->parent_pdev;
+ where = host->parent_cap_off + PCIE_LINK_CAP_OFFSET;
+ pci_read_config_dword(pci, where, &val32);
+ host->parent_aspm_cap = (u8)(val32 >> 10) & 0x03;
+
+ if (host->pdev_aspm_cap != host->parent_aspm_cap) {
+ u8 aspm_cap;
+ dev_dbg(host->dev, "host->pdev_aspm_cap: %x\n",
+ host->pdev_aspm_cap);
+ dev_dbg(host->dev, "host->parent_aspm_cap: %x\n",
+ host->parent_aspm_cap);
+ aspm_cap = host->pdev_aspm_cap & host->parent_aspm_cap;
+ host->pdev_aspm_cap = aspm_cap;
+ host->parent_aspm_cap = aspm_cap;
+ }
+
+ dev_dbg(host->dev, "ext_config_dev_aspm: %x, host->pdev_aspm_cap: %x\n",
+ host->ext_config_dev_aspm, host->pdev_aspm_cap);
+ host->ext_config_dev_aspm &= host->pdev_aspm_cap;
+ return 1;
+}
+
+static void pci_aspm_ctrl(struct au6601_host *host, u8 aspm_enable)
+{
+#define PCIE_LINK_CTRL_OFFSET 0x10
+
+ struct pci_dev *pci;
+ u8 aspm_ctrl, i;
+ int where;
+ u32 val32;
+
+ dev_dbg(host->dev, "pci_aspm_ctrl, aspm_enable: %x\n", aspm_enable);
+
+ if ((host->pdev_cap_off == 0) || (host->parent_cap_off == 0)) {
+ dev_dbg(host->dev, "pci_cap_off: %x, parent_cap_off: %x\n",
+ host->pdev_cap_off, host->parent_cap_off);
+ return;
+ }
+
+ if (host->pdev_aspm_cap == 0) {
+ return;
+ }
+
+ aspm_ctrl = 0;
+ if (aspm_enable) {
+ aspm_ctrl = host->ext_config_dev_aspm;
+
+ if (aspm_ctrl == 0) {
+ dev_dbg(host->dev, "aspm_ctrl == 0\n");
+ return;
+ }
+ }
+
+ for (i=0; i < 2; i++) {
+
+ if (i==0) {
+ pci = host->pdev;
+ where = host->pdev_cap_off + PCIE_LINK_CTRL_OFFSET;
+ }
+ else {
+ pci = host->parent_pdev;
+ where = host->parent_cap_off + PCIE_LINK_CTRL_OFFSET;
+ }
+
+ pci_read_config_dword(pci, where, &val32);
+ val32 &= (~0x03);
+ val32 |= (aspm_ctrl & host->pdev_aspm_cap);
+ pci_write_config_byte(pci, where, (u8)val32);
+ }
+
+}
+
+static inline void au6601_mask_sd_irqs(struct au6601_host *host)
+{
+ au6601_write32(host, 0, AU6601_REG_INT_ENABLE);
+}
+
+static inline void au6601_unmask_sd_irqs(struct au6601_host *host)
+{
+ au6601_write32(host, AU6601_INT_CMD_MASK | AU6601_INT_DATA_MASK |
+ AU6601_INT_CARD_INSERT | AU6601_INT_CARD_REMOVE |
+ AU6601_INT_OVER_CURRENT_ERR,
+ AU6601_REG_INT_ENABLE);
+}
+
+static inline void au6601_mask_ms_irqs(struct au6601_host *host)
+{
+ au6601_write32(host, 0, AU6601_MS_INT_ENABLE);
+}
+
+static inline void au6601_unmask_ms_irqs(struct au6601_host *host)
+{
+ au6601_write32(host, 0x3d00fa, AU6601_MS_INT_ENABLE);
+}
+
+static void au6601_reset(struct au6601_host *host, u8 val)
+{
+ int i;
+
+ au6601_write8(host, val | AU6601_BUF_CTRL_RESET,
+ AU6601_REG_SW_RESET);
+ for (i = 0; i < 100; i++) {
+ if (!(au6601_read8(host, AU6601_REG_SW_RESET) & val))
+ return;
+ udelay(50);
+ }
+ dev_err(host->dev, "%s: timeout\n", __func__);
+}
+
+static void au6601_data_set_dma(struct au6601_host *host)
+{
+ u32 addr, len;
+
+ if (!host->sg_count)
+ return;
+
+ if (!host->sg) {
+ dev_err(host->dev, "have blocks, but no SG\n");
+ return;
+ }
+
+ if (!sg_dma_len(host->sg)) {
+ dev_err(host->dev, "DMA SG len == 0\n");
+ return;
+ }
+
+
+ addr = (u32)sg_dma_address(host->sg);
+ len = sg_dma_len(host->sg);
+
+ dev_dbg(host->dev, "%s 0x%08x\n", __func__, addr);
+ au6601_write32(host, addr, AU6601_REG_SDMA_ADDR);
+ host->sg = sg_next(host->sg);
+ host->sg_count--;
+}
+
+static void au6601_trigger_data_transfer(struct au6601_host *host, bool early)
+{
+ struct mmc_data *data = host->data;
+ u8 ctrl = 0;
+
+ dev_dbg(host->dev, "%s\n", __func__);
+
+ if (data->flags & MMC_DATA_WRITE)
+ ctrl |= AU6601_DATA_WRITE;
+
+ if (data->host_cookie == COOKIE_MAPPED) {
+ if (host->early_data) {
+ host->early_data = false;
+ return;
+ }
+
+ host->early_data = early;
+
+ au6601_data_set_dma(host);
+ ctrl |= AU6601_DATA_DMA_MODE;
+ host->dma_on = 1;
+ au6601_write32(host, data->sg_count * 0x1000,
+ AU6601_REG_BLOCK_SIZE);
+ } else {
+ au6601_write32(host, data->blksz, AU6601_REG_BLOCK_SIZE);
+ }
+
+ au6601_write8(host, ctrl | AU6601_DATA_START_XFER,
+ AU6601_DATA_XFER_CTRL);
+}
+
+/*****************************************************************************\
+ * *
+ * Core functions *
+ * *
+\*****************************************************************************/
+
+static void au6601_trf_block_pio(struct au6601_host *host, bool read)
+{
+ size_t blksize, len;
+ u8 *buf;
+
+ if (!host->blocks)
+ return;
+ dev_dbg(host->dev, "%s\n", __func__);
+
+ if (host->dma_on) {
+ dev_err(host->dev, "configured DMA but got PIO request.\n");
+ return;
+ }
+
+ if (!!(host->data->flags & MMC_DATA_READ) != read) {
+ dev_err(host->dev, "got unexpected direction %i != %i\n",
+ !!(host->data->flags & MMC_DATA_READ), read);
+ }
+
+ if (!sg_miter_next(&host->sg_miter))
+ return;
+
+ blksize = host->data->blksz;
+ len = min(host->sg_miter.length, blksize);
+
+ dev_dbg(host->dev, "PIO, %s block size: 0x%zx\n",
+ read ? "read" : "write", blksize);
+
+ host->sg_miter.consumed = len;
+ host->blocks--;
+
+ buf = host->sg_miter.addr;
+
+ if (read)
+ ioread32_rep(host->iobase + AU6601_REG_BUFFER, buf, len >> 2);
+ else
+ iowrite32_rep(host->iobase + AU6601_REG_BUFFER, buf, len >> 2);
+
+ sg_miter_stop(&host->sg_miter);
+}
+
+static void au6601_finish_data(struct au6601_host *host)
+{
+ struct mmc_data *data;
+
+ data = host->data;
+ host->data = NULL;
+ host->dma_on = 0;
+
+ dev_dbg(host->dev, "Finish DATA\n");
+ /*
+ * The specification states that the block count register must
+ * be updated, but it does not specify at what point in the
+ * data flow. That makes the register entirely useless to read
+ * back so we have to assume that nothing made it to the card
+ * in the event of an error.
+ */
+ if (data->error)
+ data->bytes_xfered = 0;
+ else
+ data->bytes_xfered = data->blksz * data->blocks;
+
+ /*
+ * Need to send CMD12 if -
+ * a) open-ended multiblock transfer (no CMD23)
+ * b) error in multiblock transfer
+ */
+ if (data->stop &&
+ (data->error ||
+ !host->mrq->sbc)) {
+
+ /*
+ * The controller needs a reset of internal state machines
+ * upon error conditions.
+ */
+ if (data->error)
+ au6601_reset(host, AU6601_RESET_CMD | AU6601_RESET_DATA);
+
+ au6601_unmask_sd_irqs(host);
+ au6601_send_cmd(host, data->stop);
+ return;
+ }
+
+ au6601_request_complete(host, 1);
+}
+
+static void au6601_prepare_sg_miter(struct au6601_host *host)
+{
+ unsigned int flags = SG_MITER_ATOMIC;
+ struct mmc_data *data = host->data;
+
+ if (data->flags & MMC_DATA_READ)
+ flags |= SG_MITER_TO_SG;
+ else
+ flags |= SG_MITER_FROM_SG;
+ sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
+}
+
+static void au6601_prepare_data(struct au6601_host *host,
+ struct mmc_command *cmd)
+{
+ struct mmc_data *data = cmd->data;
+
+ if (!data)
+ return;
+
+
+ host->data = data;
+ host->data->bytes_xfered = 0;
+ host->blocks = data->blocks;
+ host->sg = data->sg;
+ host->sg_count = data->sg_count;
+ dev_dbg(host->dev, "prepare DATA: sg %i, blocks: %i\n",
+ host->sg_count, host->blocks);
+
+ if (data->host_cookie != COOKIE_MAPPED)
+ au6601_prepare_sg_miter(host);
+
+ au6601_trigger_data_transfer(host, true);
+}
+
+static void au6601_send_cmd(struct au6601_host *host,
+ struct mmc_command *cmd)
+{
+ unsigned long timeout;
+ u8 ctrl = 0;
+
+ cancel_delayed_work_sync(&host->timeout_work);
+
+ if (!cmd->data && cmd->busy_timeout)
+ timeout = cmd->busy_timeout;
+ else
+ timeout = 10000;
+
+ host->cmd = cmd;
+ au6601_prepare_data(host, cmd);
+
+ dev_dbg(host->dev, "send CMD. opcode: 0x%02x, arg; 0x%08x\n", cmd->opcode,
+ cmd->arg);
+ au6601_write8(host, cmd->opcode | 0x40, AU6601_REG_CMD_OPCODE);
+ au6601_write32be(host, cmd->arg, AU6601_REG_CMD_ARG);
+
+ switch (mmc_resp_type(cmd)) {
+ case MMC_RSP_NONE:
+ ctrl = AU6601_CMD_NO_RESP;
+ break;
+ case MMC_RSP_R1:
+ ctrl = AU6601_CMD_6_BYTE_CRC;
+ break;
+ case MMC_RSP_R1B:
+ ctrl = AU6601_CMD_6_BYTE_CRC | AU6601_CMD_STOP_WAIT_RDY;
+ break;
+ case MMC_RSP_R2:
+ ctrl = AU6601_CMD_17_BYTE_CRC;
+ break;
+ case MMC_RSP_R3:
+ ctrl = AU6601_CMD_6_BYTE_WO_CRC;
+ break;
+ default:
+ dev_err(host->dev, "%s: cmd->flag (0x%02x) is not valid\n",
+ mmc_hostname(host->mmc), mmc_resp_type(cmd));
+ break;
+ }
+
+ dev_dbg(host->dev, "xfer ctrl: 0x%02x; timeout: %lu\n", ctrl, timeout);
+ au6601_write8(host, ctrl | AU6601_CMD_START_XFER,
+ AU6601_CMD_XFER_CTRL);
+
+ schedule_delayed_work(&host->timeout_work, msecs_to_jiffies(timeout));
+}
+
+/*****************************************************************************\
+ * *
+ * Interrupt handling *
+ * *
+\*****************************************************************************/
+
+
+static void au6601_err_irq(struct au6601_host *host, u32 intmask)
+{
+ dev_dbg(host->dev, "ERR IRQ %x\n", intmask);
+
+ if (host->cmd) {
+ if (intmask & AU6601_INT_CMD_TIMEOUT_ERR)
+ host->cmd->error = -ETIMEDOUT;
+ else
+ host->cmd->error = -EILSEQ;
+ }
+
+ if (host->data) {
+ if (intmask & AU6601_INT_DATA_TIMEOUT_ERR)
+ host->data->error = -ETIMEDOUT;
+ else
+ host->data->error = -EILSEQ;
+
+ host->data->bytes_xfered = 0;
+ }
+
+ au6601_reset(host, AU6601_RESET_CMD | AU6601_RESET_DATA);
+ au6601_request_complete(host, 1);
+}
+
+static int au6601_cmd_irq_done(struct au6601_host *host, u32 intmask)
+{
+ intmask &= AU6601_INT_CMD_END;
+
+ if (!intmask)
+ return true;
+
+ /* got CMD_END but no CMD is in progress, wake thread an process the
+ * error
+ */
+ if (!host->cmd)
+ return false;
+
+ dev_dbg(host->dev, "%s %x\n", __func__, intmask);
+
+ if (host->cmd->flags & MMC_RSP_PRESENT) {
+ struct mmc_command *cmd = host->cmd;
+
+ cmd->resp[0] = au6601_read32be(host, AU6601_REG_CMD_RSP0);
+ dev_dbg(host->dev, "RSP0: 0x%04x\n", cmd->resp[0]);
+ if (host->cmd->flags & MMC_RSP_136) {
+ cmd->resp[1] =
+ au6601_read32be(host, AU6601_REG_CMD_RSP1);
+ cmd->resp[2] =
+ au6601_read32be(host, AU6601_REG_CMD_RSP2);
+ cmd->resp[3] =
+ au6601_read32be(host, AU6601_REG_CMD_RSP3);
+ dev_dbg(host->dev, "RSP1,2,3: 0x%04x 0x%04x 0x%04x\n",
+ cmd->resp[1], cmd->resp[2], cmd->resp[3]);
+ }
+
+ }
+
+ host->cmd->error = 0;
+
+ /* Processed actual command. */
+ if (!host->data)
+ return false;
+
+ au6601_trigger_data_transfer(host, false);
+ host->cmd = NULL;
+ return true;
+}
+
+static void au6601_cmd_irq_thread(struct au6601_host *host, u32 intmask)
+{
+ intmask &= AU6601_INT_CMD_END;
+
+ if (!intmask)
+ return;
+
+ if (!host->cmd && intmask & AU6601_INT_CMD_END) {
+ dev_err(host->dev,
+ "Got command interrupt 0x%08x even though no command operation was in progress.\n",
+ intmask);
+ }
+
+ dev_dbg(host->dev, "%s %x\n", __func__, intmask);
+
+ /* Processed actual command. */
+ if (!host->data)
+ au6601_request_complete(host, 1);
+ else
+ au6601_trigger_data_transfer(host, false);
+ host->cmd = NULL;
+}
+
+static int au6601_data_irq_done(struct au6601_host *host, u32 intmask)
+{
+ u32 tmp;
+
+ intmask &= AU6601_INT_DATA_MASK;
+
+ /* nothing here to do */
+ if (!intmask)
+ return 1;
+
+ dev_dbg(host->dev, "%s %x\n", __func__, intmask);
+
+ /* we was too fast and got DATA_END after it was processed?
+ * lets ignore it for now.
+ */
+ if (!host->data && intmask == AU6601_INT_DATA_END)
+ return 1;
+
+ /* looks like an error, so lets handle it. */
+ if (!host->data)
+ return 0;
+
+ tmp = intmask & (AU6601_INT_READ_BUF_RDY | AU6601_INT_WRITE_BUF_RDY
+ | AU6601_INT_DMA_END);
+ switch (tmp)
+ {
+ case 0:
+ break;
+ case AU6601_INT_READ_BUF_RDY:
+ au6601_trf_block_pio(host, true);
+ if (!host->blocks)
+ break;
+ au6601_trigger_data_transfer(host, false);
+ return 1;
+ break;
+ case AU6601_INT_WRITE_BUF_RDY:
+ au6601_trf_block_pio(host, false);
+ if (!host->blocks)
+ break;
+ au6601_trigger_data_transfer(host, false);
+ return 1;
+ break;
+ case AU6601_INT_DMA_END:
+ if (!host->sg_count) {
+ break;
+ }
+
+ au6601_data_set_dma(host);
+ break;
+ default:
+ dev_err(host->dev, "Got READ_BUF_RDY and WRITE_BUF_RDY at same time\n");
+ break;
+ }
+
+ if (intmask & AU6601_INT_DATA_END)
+ return 0;
+
+ return 1;
+}
+
+static void au6601_data_irq_thread(struct au6601_host *host, u32 intmask)
+{
+ intmask &= AU6601_INT_DATA_MASK;
+
+ if (!intmask)
+ return;
+
+ dev_dbg(host->dev, "DATA thread IRQ %x\n", intmask);
+
+ if (!host->data) {
+ dev_err(host->dev,
+ "Got data interrupt 0x%08x even though no data operation was in progress.\n",
+ (unsigned)intmask);
+ au6601_reset(host, AU6601_RESET_DATA);
+ return;
+ }
+
+ if (au6601_data_irq_done(host, intmask))
+ return;
+
+ if ((intmask & AU6601_INT_DATA_END) || !host->blocks ||
+ (host->dma_on && !host->sg_count))
+ au6601_finish_data(host);
+}
+
+static void au6601_cd_irq(struct au6601_host *host, u32 intmask)
+{
+ dev_dbg(host->dev, "card %s\n",
+ intmask & AU6601_INT_CARD_REMOVE ? "removed" : "inserted");
+
+ if (host->mrq) {
+ dev_dbg(host->dev,
+ "cancel all pending tasks.\n");
+
+ if (host->data)
+ host->data->error = -ENOMEDIUM;
+
+ if (host->cmd)
+ host->cmd->error = -ENOMEDIUM;
+ else
+ host->mrq->cmd->error = -ENOMEDIUM;
+
+ au6601_request_complete(host, 1);
+ }
+
+ mmc_detect_change(host->mmc, msecs_to_jiffies(1));
+}
+
+static irqreturn_t au6601_irq_thread(int irq, void *d)
+{
+ struct au6601_host *host = d;
+ irqreturn_t ret = IRQ_HANDLED;
+ u32 intmask, tmp;
+
+ mutex_lock(&host->cmd_mutex);
+
+ intmask = host->irq_status_sd;
+
+ /* some thing bad */
+ if (unlikely(!intmask || AU6601_INT_ALL_MASK == intmask)) {
+ dev_dbg(host->dev, "unexpected IRQ: 0x%04x\n",
+ intmask);
+ ret = IRQ_NONE;
+ goto exit;
+ }
+
+ dev_dbg(host->dev, "IRQ %x\n", intmask);
+
+ tmp = intmask & (AU6601_INT_CMD_MASK | AU6601_INT_DATA_MASK);
+ if (tmp) {
+ if (tmp & AU6601_INT_ERROR_MASK)
+ au6601_err_irq(host, tmp);
+ else {
+ au6601_cmd_irq_thread(host, tmp);
+ au6601_data_irq_thread(host, tmp);
+ }
+ intmask &= ~(AU6601_INT_CMD_MASK | AU6601_INT_DATA_MASK);
+ }
+
+ if (intmask & (AU6601_INT_CARD_INSERT | AU6601_INT_CARD_REMOVE)) {
+ au6601_cd_irq(host, intmask);
+ intmask &= ~(AU6601_INT_CARD_INSERT | AU6601_INT_CARD_REMOVE);
+ }
+
+ if (intmask & AU6601_INT_OVER_CURRENT_ERR) {
+ dev_warn(host->dev,
+ "warning: over current detected!\n");
+ intmask &= ~AU6601_INT_OVER_CURRENT_ERR;
+ }
+
+ if (intmask)
+ dev_dbg(host->dev, "got not handled IRQ: 0x%04x\n", intmask);
+
+exit:
+ mutex_unlock(&host->cmd_mutex);
+ au6601_unmask_sd_irqs(host);
+ return ret;
+}
+
+
+static irqreturn_t au6601_irq(int irq, void *d)
+{
+ struct au6601_host *host = d;
+ u32 status, tmp;
+ irqreturn_t ret;
+ int cmd_done, data_done;
+
+ status = au6601_read32(host, AU6601_REG_INT_STATUS);
+ if (!status)
+ return IRQ_NONE;
+
+ spin_lock(&host->lock);
+ au6601_write32(host, status, AU6601_REG_INT_STATUS);
+
+ tmp = status & (AU6601_INT_READ_BUF_RDY | AU6601_INT_WRITE_BUF_RDY
+ | AU6601_INT_DATA_END | AU6601_INT_DMA_END
+ | AU6601_INT_CMD_END);
+ if (tmp == status) {
+ cmd_done = au6601_cmd_irq_done(host, tmp);
+ data_done = au6601_data_irq_done(host, tmp);
+ /* use fast path for simple tasks */
+ if (cmd_done && data_done) {
+ ret = IRQ_HANDLED;
+ goto au6601_irq_done;
+ }
+ }
+
+ host->irq_status_sd = status;
+ ret = IRQ_WAKE_THREAD;
+ au6601_mask_sd_irqs(host);
+au6601_irq_done:
+ spin_unlock(&host->lock);
+ return ret;
+}
+
+static void au6601_set_clock(struct au6601_host *host, unsigned int clock)
+{
+ unsigned int clock_out = 0;
+ int i, diff = 0x7fffffff, tmp_clock = 0;
+ u16 clk_src = 0;
+ u8 clk_div = 0;
+
+ if (clock == 0) {
+ au6601_write16(host, 0, AU6601_CLK_SELECT);
+ return;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(au6601_pll_cfg); i++) {
+ unsigned int tmp_div, tmp_diff;
+ const struct au6601_pll_conf *cfg = &au6601_pll_cfg[i];
+
+ tmp_div = DIV_ROUND_UP(cfg->clk_src_freq, clock);
+ if (cfg->min_div > tmp_div || tmp_div > cfg->max_div)
+ continue;
+
+ tmp_clock = DIV_ROUND_UP(cfg->clk_src_freq, tmp_div);
+ tmp_diff = abs(clock - tmp_clock);
+
+ if (tmp_diff >= 0 && tmp_diff < diff) {
+ diff = tmp_diff;
+ clk_src = cfg->clk_src_reg;
+ clk_div = tmp_div;
+ clock_out = tmp_clock;
+ }
+ }
+
+ clk_src |= ((clk_div - 1) << 8);
+ clk_src |= AU6601_CLK_ENABLE;
+
+ dev_dbg(host->dev, "set freq %d cal freq %d, use div %d, mod %x\n",
+ clock, tmp_clock, clk_div, clk_src);
+
+ au6601_write16(host, clk_src, AU6601_CLK_SELECT);
+
+}
+
+static void au6601_set_timing(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct au6601_host *host = mmc_priv(mmc);
+
+ if (ios->timing == MMC_TIMING_LEGACY) {
+ au6601_rmw8(host, AU6601_CLK_DELAY,
+ AU6601_CLK_POSITIVE_EDGE_ALL, 0);
+ } else {
+ au6601_rmw8(host, AU6601_CLK_DELAY,
+ 0, AU6601_CLK_POSITIVE_EDGE_ALL);
+ }
+}
+
+static void au6601_set_bus_width(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct au6601_host *host = mmc_priv(mmc);
+
+ if (ios->bus_width == MMC_BUS_WIDTH_1) {
+ au6601_write8(host, 0, AU6601_REG_BUS_CTRL);
+ } else if (ios->bus_width == MMC_BUS_WIDTH_4) {
+ au6601_write8(host, AU6601_BUS_WIDTH_4BIT,
+ AU6601_REG_BUS_CTRL);
+ } else
+ dev_err(host->dev, "Unknown BUS mode\n");
+
+}
+
+static int au6601_card_busy(struct mmc_host *mmc)
+{
+ struct au6601_host *host = mmc_priv(mmc);
+ u8 status;
+
+ dev_dbg(host->dev, "%s:%i\n", __func__, __LINE__);
+ /* Check whether dat[0:3] low */
+ status = au6601_read8(host, AU6601_DATA_PIN_STATE);
+
+ return !(status & AU6601_BUS_STAT_DAT_MASK);
+}
+
+static int au6601_get_cd(struct mmc_host *mmc)
+{
+ struct au6601_host *host = mmc_priv(mmc);
+ u8 detect;
+
+ detect = au6601_read8(host, AU6601_DETECT_STATUS)
+ & AU6601_DETECT_STATUS_M;
+ /* check if card is present then send command and data */
+ return (AU6601_SD_DETECTED == detect);
+}
+
+static int au6601_get_ro(struct mmc_host *mmc)
+{
+ struct au6601_host *host = mmc_priv(mmc);
+ u8 status;
+
+ /* get write protect pin status */
+ status = au6601_read8(host, AU6601_INTERFACE_MODE_CTRL);
+ dev_dbg(host->dev, "get write protect status %x\n", status);
+
+ return !!(status & AU6601_SD_CARD_WP);
+}
+
+static void au6601_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ struct au6601_host *host = mmc_priv(mmc);
+
+ mutex_lock(&host->cmd_mutex);
+
+ dev_dbg(host->dev, "got request\n");
+ host->mrq = mrq;
+
+ /* check if card is present then send command and data */
+ if (au6601_get_cd(mmc))
+ au6601_send_cmd(host, mrq->cmd);
+ else {
+ dev_dbg(host->dev, "card is not present\n");
+ mrq->cmd->error = -ENOMEDIUM;
+ au6601_request_complete(host, 1);
+ }
+
+ mutex_unlock(&host->cmd_mutex);
+}
+
+static void au6601_pre_req(struct mmc_host *mmc,
+ struct mmc_request *mrq)
+{
+ struct au6601_host *host = mmc_priv(mmc);
+ struct mmc_data *data = mrq->data;
+ struct mmc_command *cmd = mrq->cmd;
+ struct scatterlist *sg;
+ unsigned int i, sg_len;
+
+ if (!host->use_dma || !data || !cmd)
+ return;
+
+ data->host_cookie = COOKIE_UNMAPPED;
+
+ if (cmd->opcode != 18)
+ return;
+ /*
+ * We don't do DMA on "complex" transfers, i.e. with
+ * non-word-aligned buffers or lengths. Also, we don't bother
+ * with all the DMA setup overhead for short transfers.
+ */
+ if (data->blocks * data->blksz < AU6601_MAX_DMA_BLOCK_SIZE)
+ return;
+
+ if (data->blksz & 3)
+ return;
+
+ for_each_sg(data->sg, sg, data->sg_len, i) {
+ if (sg->length != AU6601_MAX_DMA_BLOCK_SIZE)
+ return;
+ }
+
+ dev_dbg(host->dev, "do pre request\n");
+ /* This data might be unmapped at this time */
+
+ sg_len = dma_map_sg(host->dev, data->sg, data->sg_len,
+ mmc_get_dma_dir(data));
+ if (sg_len)
+ data->host_cookie = COOKIE_MAPPED;
+
+ data->sg_count = sg_len;
+}
+
+static void au6601_post_req(struct mmc_host *mmc,
+ struct mmc_request *mrq,
+ int err)
+{
+ struct au6601_host *host = mmc_priv(mmc);
+ struct mmc_data *data = mrq->data;
+
+ if (!host->use_dma || !data)
+ return;
+
+ dev_dbg(host->dev, "do post request\n");
+
+ if (data->host_cookie == COOKIE_MAPPED) {
+ dma_unmap_sg(host->dev,
+ data->sg,
+ data->sg_len,
+ mmc_get_dma_dir(data));
+ }
+
+ data->host_cookie = COOKIE_UNMAPPED;
+}
+
+static void au6601_set_power_mode(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct au6601_host *host = mmc_priv(mmc);
+
+ switch (ios->power_mode) {
+ case MMC_POWER_OFF:
+ au6601_set_clock(host, ios->clock);
+ /* set all pins to input */
+ au6601_write8(host, 0, AU6601_OUTPUT_ENABLE);
+ /* turn of Vcc */
+ au6601_write8(host, 0, AU6601_POWER_CONTROL);
+ pci_aspm_ctrl(host, 1);
+ break;
+ case MMC_POWER_UP:
+ break;
+ case MMC_POWER_ON:
+ pci_aspm_ctrl(host, 0);
+ au6601_write8(host, AU6601_SD_CARD,
+ AU6601_ACTIVE_CTRL);
+ au6601_write8(host, 0, AU6601_OPT);
+ au6601_write8(host, 0x20, AU6601_CLK_DELAY);
+ au6601_write8(host, 0, AU6601_REG_BUS_CTRL);
+ au6601_set_clock(host, ios->clock);
+ /* set power on Vcc */
+ au6601_write8(host, AU6601_SD_CARD,
+ AU6601_POWER_CONTROL);
+ mdelay(20);
+ au6601_set_clock(host, ios->clock);
+
+ au6601_write8(host, AU6601_SD_CARD,
+ AU6601_OUTPUT_ENABLE);
+ /* The clk will not work on au6621. We need read some thing out */
+ au6601_write8(host, AU6601_DATA_WRITE,
+ AU6601_DATA_XFER_CTRL);
+ au6601_write8(host, 0x7d, AU6601_TIME_OUT_CTRL);
+ mdelay(100);
+ break;
+ default:
+ dev_err(host->dev, "Unknown power parametr\n");
+ }
+}
+
+static void au6601_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct au6601_host *host = mmc_priv(mmc);
+
+ mutex_lock(&host->cmd_mutex);
+
+ dev_dbg(host->dev, "set ios. bus width: %x, power mode: %x\n",
+ ios->bus_width, ios->power_mode);
+
+ if (ios->power_mode != host->cur_power_mode) {
+ au6601_set_power_mode(mmc, ios);
+ host->cur_power_mode = ios->power_mode;
+ } else {
+ au6601_set_timing(mmc, ios);
+ au6601_set_bus_width(mmc, ios);
+ au6601_set_clock(host, ios->clock);
+ }
+
+ mutex_unlock(&host->cmd_mutex);
+}
+
+static int au6601_signal_voltage_switch(struct mmc_host *mmc,
+ struct mmc_ios *ios)
+{
+ struct au6601_host *host = mmc_priv(mmc);
+
+ mutex_lock(&host->cmd_mutex);
+
+ dev_dbg(host->dev, "%s:%i\n", __func__, __LINE__);
+ switch (ios->signal_voltage) {
+ case MMC_SIGNAL_VOLTAGE_330:
+ au6601_rmw8(host, AU6601_OPT, AU6601_OPT_SD_18V, 0);
+ break;
+ case MMC_SIGNAL_VOLTAGE_180:
+ au6601_rmw8(host, AU6601_OPT, 0, AU6601_OPT_SD_18V);
+ break;
+ default:
+ /* No signal voltage switch required */
+ break;
+ }
+
+ mutex_unlock(&host->cmd_mutex);
+ return 0;
+}
+
+static const struct mmc_host_ops au6601_sdc_ops = {
+ .card_busy = au6601_card_busy,
+ .get_cd = au6601_get_cd,
+ .get_ro = au6601_get_ro,
+ .post_req = au6601_post_req,
+ .pre_req = au6601_pre_req,
+ .request = au6601_request,
+ .set_ios = au6601_set_ios,
+ .start_signal_voltage_switch = au6601_signal_voltage_switch,
+};
+
+static void au6601_request_complete(struct au6601_host *host,
+ bool cancel_timeout)
+{
+ struct mmc_request *mrq;
+
+ /*
+ * If this tasklet gets rescheduled while running, it will
+ * be run again afterwards but without any active request.
+ */
+ if (!host->mrq) {
+ dev_dbg(host->dev, "nothing to complete\n");
+ return;
+ }
+
+ if (cancel_timeout)
+ cancel_delayed_work_sync(&host->timeout_work);
+
+ mrq = host->mrq;
+
+ host->mrq = NULL;
+ host->cmd = NULL;
+ host->data = NULL;
+ host->dma_on = 0;
+
+ dev_dbg(host->dev, "request complete\n");
+ mmc_request_done(host->mmc, mrq);
+}
+
+static void au6601_timeout_timer(struct work_struct *work)
+{
+ struct delayed_work *d = to_delayed_work(work);
+ struct au6601_host *host = container_of(d, struct au6601_host,
+ timeout_work);
+ mutex_lock(&host->cmd_mutex);
+
+ dev_dbg(host->dev, "triggered timeout\n");
+ if (host->mrq) {
+ dev_err(host->dev,
+ "Timeout waiting for hardware interrupt.\n");
+
+ if (host->data) {
+ host->data->error = -ETIMEDOUT;
+ } else {
+ if (host->cmd)
+ host->cmd->error = -ETIMEDOUT;
+ else
+ host->mrq->cmd->error = -ETIMEDOUT;
+ }
+
+ au6601_reset(host, AU6601_RESET_CMD | AU6601_RESET_DATA);
+ au6601_request_complete(host, 0);
+ }
+
+ mmiowb();
+ mutex_unlock(&host->cmd_mutex);
+}
+
+
+
+static void au6601_init_mmc(struct au6601_host *host)
+{
+ struct mmc_host *mmc = host->mmc;
+
+ mmc->f_min = AU6601_MIN_CLOCK;
+ mmc->f_max = AU6601_MAX_CLOCK;
+ /* mesured Vdd: 3.4 and 1.8 */
+ mmc->ocr_avail = MMC_VDD_165_195 | MMC_VDD_33_34;
+ mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED;
+ mmc->caps2 = MMC_CAP2_NO_SDIO;
+ mmc->ops = &au6601_sdc_ops;
+
+ /* Hardware cannot do scatter lists */
+ mmc->max_segs = host->use_dma ? AU6601_MAX_DMA_SEGMENTS
+ : AU6601_MAX_PIO_SEGMENTS;
+ mmc->max_seg_size = host->use_dma ? AU6601_MAX_DMA_BLOCK_SIZE
+ : AU6601_MAX_PIO_BLOCK_SIZE;
+
+ mmc->max_blk_size = mmc->max_seg_size;
+ mmc->max_blk_count = mmc->max_segs;
+
+ mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
+}
+
+static void au6601_hw_init(struct au6601_host *host)
+{
+ struct au6601_dev_cfg *cfg = host->cfg;
+
+ au6601_reset(host, AU6601_RESET_CMD);
+
+ au6601_write8(host, 0, AU6601_DMA_BOUNDARY);
+ au6601_write8(host, AU6601_SD_CARD, AU6601_ACTIVE_CTRL);
+
+ au6601_write8(host, 0, AU6601_REG_BUS_CTRL);
+
+ au6601_reset(host, AU6601_RESET_DATA);
+ au6601_write8(host, 0, AU6601_DMA_BOUNDARY);
+
+ au6601_write8(host, 0, AU6601_INTERFACE_MODE_CTRL);
+ au6601_write8(host, 0x44, AU6601_PAD_DRIVE0);
+ au6601_write8(host, 0x44, AU6601_PAD_DRIVE1);
+ au6601_write8(host, 0x00, AU6601_PAD_DRIVE2);
+
+ /* kind of read eeprom */
+ au6601_write8(host, 0x01, AU6601_FUNCTION);
+ au6601_read8(host, AU6601_FUNCTION);
+
+ /* for 6601 - dma_boundary; for 6621 - dma_page_cnt */
+ au6601_write8(host, cfg->dma, AU6601_DMA_BOUNDARY);
+
+ au6601_write8(host, 0, AU6601_OUTPUT_ENABLE);
+ au6601_write8(host, 0, AU6601_POWER_CONTROL);
+ pci_aspm_ctrl(host, 1);
+
+ host->dma_on = 0;
+
+ au6601_write8(host, AU6601_DETECT_EN, AU6601_DETECT_STATUS);
+ /* now we should be safe to enable IRQs */
+ au6601_unmask_sd_irqs(host);
+ /* currently i don't know how to properly handle MS IRQ
+ * and HW to test it. */
+ au6601_mask_ms_irqs(host);
+}
+
+static int au6601_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct au6601_dev_cfg *cfg;
+ struct mmc_host *mmc;
+ struct au6601_host *host;
+ int ret, bar = 0;
+
+ dev_info(&pdev->dev, "AU6601 controller found [%04x:%04x] (rev %x)\n",
+ (int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
+ cfg = (void *)ent->driver_data;
+
+ ret = pcim_enable_device(pdev);
+ if (ret)
+ return ret;
+
+ mmc = mmc_alloc_host(sizeof(struct au6601_host *), &pdev->dev);
+ if (!mmc) {
+ dev_err(&pdev->dev, "Can't allocate MMC\n");
+ return -ENOMEM;
+ }
+
+ host = mmc_priv(mmc);
+ host->mmc = mmc;
+ host->pdev = pdev;
+ host->parent_pdev = pdev->bus->self;
+ host->dev = &pdev->dev;
+ host->cfg = cfg;
+ host->cur_power_mode = MMC_POWER_UNDEFINED;
+ host->use_dma = use_dma;
+
+ ret = pci_request_regions(pdev, DRVNAME);
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot request region\n");
+ return -ENOMEM;
+ }
+
+ if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
+ dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar);
+ ret = -ENODEV;
+ goto error_release_regions;
+ }
+
+ host->iobase = pcim_iomap(pdev, bar, 0);
+ if (!host->iobase) {
+ ret = -ENOMEM;
+ goto error_release_regions;
+ }
+
+ /* make sure irqs are disabled */
+ au6601_mask_sd_irqs(host);
+ au6601_mask_ms_irqs(host);
+
+ ret = devm_request_threaded_irq(&pdev->dev, pdev->irq,
+ au6601_irq, au6601_irq_thread, IRQF_SHARED,
+ "au6601", host);
+
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to get irq for data line\n");
+ ret = -ENOMEM;
+ goto error_release_regions;
+ }
+
+ ret = dma_set_mask_and_coherent(host->dev, AU6601_SDMA_MASK);
+ if (ret) {
+ dev_err(host->dev, "Failed to set DMA mask\n");
+ goto error_release_regions;
+ }
+
+ pci_set_master(pdev);
+ pci_set_drvdata(pdev, host);
+ pci_init_check_aspm(host);
+
+ spin_lock_init(&host->lock);
+ mutex_init(&host->cmd_mutex);
+ /*
+ * Init tasklets.
+ */
+ INIT_DELAYED_WORK(&host->timeout_work, au6601_timeout_timer);
+
+ au6601_init_mmc(host);
+ au6601_hw_init(host);
+
+ mmc_add_host(mmc);
+ return 0;
+
+error_release_regions:
+ pci_release_regions(pdev);
+ return ret;
+}
+
+static void au6601_hw_uninit(struct au6601_host *host)
+{
+ au6601_mask_sd_irqs(host);
+ au6601_mask_ms_irqs(host);
+
+ au6601_reset(host, AU6601_RESET_CMD | AU6601_RESET_DATA);
+
+ au6601_write8(host, 0, AU6601_DETECT_STATUS);
+
+ au6601_write8(host, 0, AU6601_OUTPUT_ENABLE);
+ au6601_write8(host, 0, AU6601_POWER_CONTROL);
+
+ au6601_write8(host, 0, AU6601_OPT);
+ pci_aspm_ctrl(host, 1);
+}
+
+static void au6601_pci_remove(struct pci_dev *pdev)
+{
+ struct au6601_host *host;
+
+ host = pci_get_drvdata(pdev);
+
+ if (cancel_delayed_work_sync(&host->timeout_work))
+ au6601_request_complete(host, 0);
+
+ mmc_remove_host(host->mmc);
+
+ au6601_hw_uninit(host);
+
+ mmc_free_host(host->mmc);
+
+ pci_release_regions(pdev);
+ pci_set_drvdata(pdev, NULL);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int au6601_suspend(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct au6601_host *host = pci_get_drvdata(pdev);
+
+ cancel_delayed_work_sync(&host->timeout_work);
+ flush_delayed_work(&host->timeout_work);
+ au6601_hw_uninit(host);
+ return 0;
+}
+
+static int au6601_resume(struct device *dev)
+{
+
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct au6601_host *host = pci_get_drvdata(pdev);
+
+ mutex_lock(&host->cmd_mutex);
+ au6601_hw_init(host);
+ mutex_unlock(&host->cmd_mutex);
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(au6601_pm_ops, au6601_suspend, au6601_resume);
+
+static struct pci_driver au6601_driver = {
+ .name = DRVNAME,
+ .id_table = pci_ids,
+ .probe = au6601_pci_probe,
+ .remove = au6601_pci_remove,
+ .driver = {
+ .pm = &au6601_pm_ops
+ },
+};
+
+module_pci_driver(au6601_driver);
+
+MODULE_AUTHOR("Oleksij Rempel <linux@xxxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("PCI driver for Alcor Micro AU6601 Secure Digital Host Controller Interface");
+MODULE_LICENSE("GPL");
--
2.14.1
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