Hi Ulf,
this patch was send for two months. Just to make sure it was not forgotten.
Am 17.07.2018 um 10:07 schrieb Oleksij Rempel:
> Hi Ulf,
>
> this patch was send for one month. Just to make sure it was not forgotten.
>
> Am 18.06.2018 um 07:19 schrieb Oleksij Rempel:
>> 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");
>>
>
>
--
Regards,
Oleksij
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