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sh: prepare MMCIF driver header file
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Update the MMCIF driver to include register information
and register access functions in the header file.
The MMCIF boot code builds on top of this.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Magnus Damm authored and Paul Mundt committed May 31, 2010
1 parent b34bce4 commit 487d9fc
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Showing 2 changed files with 82 additions and 75 deletions.
125 changes: 50 additions & 75 deletions drivers/mmc/host/sh_mmcif.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -30,25 +30,6 @@
#define DRIVER_NAME "sh_mmcif"
#define DRIVER_VERSION "2010-04-28"

#define MMCIF_CE_CMD_SET 0x00000000
#define MMCIF_CE_ARG 0x00000008
#define MMCIF_CE_ARG_CMD12 0x0000000C
#define MMCIF_CE_CMD_CTRL 0x00000010
#define MMCIF_CE_BLOCK_SET 0x00000014
#define MMCIF_CE_CLK_CTRL 0x00000018
#define MMCIF_CE_BUF_ACC 0x0000001C
#define MMCIF_CE_RESP3 0x00000020
#define MMCIF_CE_RESP2 0x00000024
#define MMCIF_CE_RESP1 0x00000028
#define MMCIF_CE_RESP0 0x0000002C
#define MMCIF_CE_RESP_CMD12 0x00000030
#define MMCIF_CE_DATA 0x00000034
#define MMCIF_CE_INT 0x00000040
#define MMCIF_CE_INT_MASK 0x00000044
#define MMCIF_CE_HOST_STS1 0x00000048
#define MMCIF_CE_HOST_STS2 0x0000004C
#define MMCIF_CE_VERSION 0x0000007C

/* CE_CMD_SET */
#define CMD_MASK 0x3f000000
#define CMD_SET_RTYP_NO ((0 << 23) | (0 << 22))
Expand Down Expand Up @@ -207,27 +188,17 @@ struct sh_mmcif_host {
wait_queue_head_t intr_wait;
};

static inline u32 sh_mmcif_readl(struct sh_mmcif_host *host, unsigned int reg)
{
return readl(host->addr + reg);
}

static inline void sh_mmcif_writel(struct sh_mmcif_host *host,
unsigned int reg, u32 val)
{
writel(val, host->addr + reg);
}

static inline void sh_mmcif_bitset(struct sh_mmcif_host *host,
unsigned int reg, u32 val)
{
writel(val | sh_mmcif_readl(host, reg), host->addr + reg);
writel(val | readl(host->addr + reg), host->addr + reg);
}

static inline void sh_mmcif_bitclr(struct sh_mmcif_host *host,
unsigned int reg, u32 val)
{
writel(~val & sh_mmcif_readl(host, reg), host->addr + reg);
writel(~val & readl(host->addr + reg), host->addr + reg);
}


Expand All @@ -253,10 +224,10 @@ static void sh_mmcif_sync_reset(struct sh_mmcif_host *host)
{
u32 tmp;

tmp = 0x010f0000 & sh_mmcif_readl(host, MMCIF_CE_CLK_CTRL);
tmp = 0x010f0000 & sh_mmcif_readl(host->addr, MMCIF_CE_CLK_CTRL);

sh_mmcif_writel(host, MMCIF_CE_VERSION, SOFT_RST_ON);
sh_mmcif_writel(host, MMCIF_CE_VERSION, SOFT_RST_OFF);
sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_ON);
sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_OFF);
sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, tmp |
SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29);
/* byte swap on */
Expand All @@ -271,12 +242,10 @@ static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
host->sd_error = 0;
host->wait_int = 0;

state1 = sh_mmcif_readl(host, MMCIF_CE_HOST_STS1);
state2 = sh_mmcif_readl(host, MMCIF_CE_HOST_STS2);
pr_debug("%s: ERR HOST_STS1 = %08x\n", \
DRIVER_NAME, sh_mmcif_readl(host, MMCIF_CE_HOST_STS1));
pr_debug("%s: ERR HOST_STS2 = %08x\n", \
DRIVER_NAME, sh_mmcif_readl(host, MMCIF_CE_HOST_STS2));
state1 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1);
state2 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS2);
pr_debug("%s: ERR HOST_STS1 = %08x\n", DRIVER_NAME, state1);
pr_debug("%s: ERR HOST_STS2 = %08x\n", DRIVER_NAME, state2);

if (state1 & STS1_CMDSEQ) {
sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, CMD_CTRL_BREAK);
Expand All @@ -288,7 +257,7 @@ static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
"command sequence timeout err\n");
return -EIO;
}
if (!(sh_mmcif_readl(host, MMCIF_CE_HOST_STS1)
if (!(sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1)
& STS1_CMDSEQ))
break;
mdelay(1);
Expand Down Expand Up @@ -330,9 +299,9 @@ static int sh_mmcif_single_read(struct sh_mmcif_host *host,

host->wait_int = 0;
blocksize = (BLOCK_SIZE_MASK &
sh_mmcif_readl(host, MMCIF_CE_BLOCK_SET)) + 3;
sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3;
for (i = 0; i < blocksize / 4; i++)
*p++ = sh_mmcif_readl(host, MMCIF_CE_DATA);
*p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA);

/* buffer read end */
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
Expand All @@ -353,7 +322,8 @@ static int sh_mmcif_multi_read(struct sh_mmcif_host *host,
long time;
u32 blocksize, i, j, sec, *p;

blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host, MMCIF_CE_BLOCK_SET);
blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr,
MMCIF_CE_BLOCK_SET);
for (j = 0; j < data->sg_len; j++) {
p = sg_virt(data->sg);
host->wait_int = 0;
Expand All @@ -370,7 +340,8 @@ static int sh_mmcif_multi_read(struct sh_mmcif_host *host,

host->wait_int = 0;
for (i = 0; i < blocksize / 4; i++)
*p++ = sh_mmcif_readl(host, MMCIF_CE_DATA);
*p++ = sh_mmcif_readl(host->addr,
MMCIF_CE_DATA);
}
if (j < data->sg_len - 1)
data->sg++;
Expand All @@ -397,9 +368,9 @@ static int sh_mmcif_single_write(struct sh_mmcif_host *host,

host->wait_int = 0;
blocksize = (BLOCK_SIZE_MASK &
sh_mmcif_readl(host, MMCIF_CE_BLOCK_SET)) + 3;
sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3;
for (i = 0; i < blocksize / 4; i++)
sh_mmcif_writel(host, MMCIF_CE_DATA, *p++);
sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++);

/* buffer write end */
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
Expand All @@ -421,7 +392,8 @@ static int sh_mmcif_multi_write(struct sh_mmcif_host *host,
long time;
u32 i, sec, j, blocksize, *p;

blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host, MMCIF_CE_BLOCK_SET);
blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr,
MMCIF_CE_BLOCK_SET);

for (j = 0; j < data->sg_len; j++) {
p = sg_virt(data->sg);
Expand All @@ -439,7 +411,8 @@ static int sh_mmcif_multi_write(struct sh_mmcif_host *host,

host->wait_int = 0;
for (i = 0; i < blocksize / 4; i++)
sh_mmcif_writel(host, MMCIF_CE_DATA, *p++);
sh_mmcif_writel(host->addr,
MMCIF_CE_DATA, *p++);
}
if (j < data->sg_len - 1)
data->sg++;
Expand All @@ -451,18 +424,18 @@ static void sh_mmcif_get_response(struct sh_mmcif_host *host,
struct mmc_command *cmd)
{
if (cmd->flags & MMC_RSP_136) {
cmd->resp[0] = sh_mmcif_readl(host, MMCIF_CE_RESP3);
cmd->resp[1] = sh_mmcif_readl(host, MMCIF_CE_RESP2);
cmd->resp[2] = sh_mmcif_readl(host, MMCIF_CE_RESP1);
cmd->resp[3] = sh_mmcif_readl(host, MMCIF_CE_RESP0);
cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP3);
cmd->resp[1] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP2);
cmd->resp[2] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP1);
cmd->resp[3] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0);
} else
cmd->resp[0] = sh_mmcif_readl(host, MMCIF_CE_RESP0);
cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0);
}

static void sh_mmcif_get_cmd12response(struct sh_mmcif_host *host,
struct mmc_command *cmd)
{
cmd->resp[0] = sh_mmcif_readl(host, MMCIF_CE_RESP_CMD12);
cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP_CMD12);
}

static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
Expand Down Expand Up @@ -596,18 +569,19 @@ static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO;

if (host->data) {
sh_mmcif_writel(host, MMCIF_CE_BLOCK_SET, 0);
sh_mmcif_writel(host, MMCIF_CE_BLOCK_SET, mrq->data->blksz);
sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, 0);
sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET,
mrq->data->blksz);
}
opc = sh_mmcif_set_cmd(host, mrq, cmd, opc);

sh_mmcif_writel(host, MMCIF_CE_INT, 0xD80430C0);
sh_mmcif_writel(host, MMCIF_CE_INT_MASK, mask);
sh_mmcif_writel(host->addr, MMCIF_CE_INT, 0xD80430C0);
sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, mask);
/* set arg */
sh_mmcif_writel(host, MMCIF_CE_ARG, cmd->arg);
sh_mmcif_writel(host->addr, MMCIF_CE_ARG, cmd->arg);
host->wait_int = 0;
/* set cmd */
sh_mmcif_writel(host, MMCIF_CE_CMD_SET, opc);
sh_mmcif_writel(host->addr, MMCIF_CE_CMD_SET, opc);

time = wait_event_interruptible_timeout(host->intr_wait,
host->wait_int == 1 || host->sd_error == 1, host->timeout);
Expand Down Expand Up @@ -752,43 +726,44 @@ static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
u32 state = 0;
int err = 0;

state = sh_mmcif_readl(host, MMCIF_CE_INT);
state = sh_mmcif_readl(host->addr, MMCIF_CE_INT);

if (state & INT_RBSYE) {
sh_mmcif_writel(host, MMCIF_CE_INT, ~(INT_RBSYE | INT_CRSPE));
sh_mmcif_writel(host->addr, MMCIF_CE_INT,
~(INT_RBSYE | INT_CRSPE));
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MRBSYE);
} else if (state & INT_CRSPE) {
sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_CRSPE);
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_CRSPE);
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCRSPE);
} else if (state & INT_BUFREN) {
sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_BUFREN);
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFREN);
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
} else if (state & INT_BUFWEN) {
sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_BUFWEN);
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFWEN);
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
} else if (state & INT_CMD12DRE) {
sh_mmcif_writel(host, MMCIF_CE_INT,
sh_mmcif_writel(host->addr, MMCIF_CE_INT,
~(INT_CMD12DRE | INT_CMD12RBE |
INT_CMD12CRE | INT_BUFRE));
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
} else if (state & INT_BUFRE) {
sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_BUFRE);
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFRE);
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
} else if (state & INT_DTRANE) {
sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_DTRANE);
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_DTRANE);
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
} else if (state & INT_CMD12RBE) {
sh_mmcif_writel(host, MMCIF_CE_INT,
sh_mmcif_writel(host->addr, MMCIF_CE_INT,
~(INT_CMD12RBE | INT_CMD12CRE));
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
} else if (state & INT_ERR_STS) {
/* err interrupts */
sh_mmcif_writel(host, MMCIF_CE_INT, ~state);
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
err = 1;
} else {
pr_debug("%s: Not support int\n", DRIVER_NAME);
sh_mmcif_writel(host, MMCIF_CE_INT, ~state);
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
err = 1;
}
Expand Down Expand Up @@ -894,12 +869,12 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
goto clean_up2;
}

sh_mmcif_writel(host, MMCIF_CE_INT_MASK, MASK_ALL);
sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
sh_mmcif_detect(host->mmc);

pr_info("%s: driver version %s\n", DRIVER_NAME, DRIVER_VERSION);
pr_debug("%s: chip ver H'%04x\n", DRIVER_NAME,
sh_mmcif_readl(host, MMCIF_CE_VERSION) & 0x0000ffff);
sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0x0000ffff);
return ret;

clean_up2:
Expand All @@ -917,7 +892,7 @@ static int __devexit sh_mmcif_remove(struct platform_device *pdev)
struct sh_mmcif_host *host = platform_get_drvdata(pdev);
int irq[2];

sh_mmcif_writel(host, MMCIF_CE_INT_MASK, MASK_ALL);
sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);

irq[0] = platform_get_irq(pdev, 0);
irq[1] = platform_get_irq(pdev, 1);
Expand Down
32 changes: 32 additions & 0 deletions include/linux/mmc/sh_mmcif.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,9 @@
#ifndef __SH_MMCIF_H__
#define __SH_MMCIF_H__

#include <linux/platform_device.h>
#include <linux/io.h>

/*
* MMCIF : CE_CLK_CTRL [19:16]
* 1000 : Peripheral clock / 512
Expand All @@ -36,4 +39,33 @@ struct sh_mmcif_plat_data {
u32 ocr;
};

#define MMCIF_CE_CMD_SET 0x00000000
#define MMCIF_CE_ARG 0x00000008
#define MMCIF_CE_ARG_CMD12 0x0000000C
#define MMCIF_CE_CMD_CTRL 0x00000010
#define MMCIF_CE_BLOCK_SET 0x00000014
#define MMCIF_CE_CLK_CTRL 0x00000018
#define MMCIF_CE_BUF_ACC 0x0000001C
#define MMCIF_CE_RESP3 0x00000020
#define MMCIF_CE_RESP2 0x00000024
#define MMCIF_CE_RESP1 0x00000028
#define MMCIF_CE_RESP0 0x0000002C
#define MMCIF_CE_RESP_CMD12 0x00000030
#define MMCIF_CE_DATA 0x00000034
#define MMCIF_CE_INT 0x00000040
#define MMCIF_CE_INT_MASK 0x00000044
#define MMCIF_CE_HOST_STS1 0x00000048
#define MMCIF_CE_HOST_STS2 0x0000004C
#define MMCIF_CE_VERSION 0x0000007C

extern inline u32 sh_mmcif_readl(void __iomem *addr, int reg)
{
return readl(addr + reg);
}

extern inline void sh_mmcif_writel(void __iomem *addr, int reg, u32 val)
{
writel(val, addr + reg);
}

#endif /* __SH_MMCIF_H__ */

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