Commit 3ae4b7e3 authored by Adrian Hunter's avatar Adrian Hunter Committed by Tony Lindgren

ARM: OMAP: updated N800/N810 support for OneNAND

Updates omap2 support for OneNAND on N800/N810.
Signed-off-by: default avatarAdrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 4f5b45a2
......@@ -21,7 +21,7 @@
static struct mtd_partition n800_partitions[8];
static int n800_onenand_setup(void __iomem *);
static int n800_onenand_setup(void __iomem *, int freq);
static struct omap_onenand_platform_data n800_onenand_data = {
.cs = 0,
......@@ -49,56 +49,103 @@ static void omap2_onenand_writew(unsigned short value, void __iomem *addr)
writew(value, addr);
}
static int omap2_onenand_set_sync_mode(int cs, void __iomem *onenand_base)
static int omap2_onenand_set_sync_mode(int cs, void __iomem *onenand_base,
int freq)
{
const int min_gpmc_clk_period = 18;
struct gpmc_timings t;
int min_gpmc_clk_period, t_ces, t_avds, t_avdh, t_avdp, t_wpl, t_wea;
int tick_ns, div, fclk_offset_ns, fclk_offset, gpmc_clk_ns, latency;
int err;
u32 reg;
tick_ns = gpmc_round_ns_to_ticks(1);
again:
switch (freq) {
case 83:
min_gpmc_clk_period = 12; /* 83 MHz */
t_ces = 5;
t_avds = 5;
t_avdh = 6;
t_avdp = 12;
t_wpl = 40;
t_wea = 15;
break;
case 66:
min_gpmc_clk_period = 15; /* 66 MHz */
t_ces = 6;
t_avds = 5;
t_avdh = 6;
t_avdp = 12;
t_wpl = 40;
t_wea = 15;
break;
default:
min_gpmc_clk_period = 18; /* 54 MHz */
t_ces = 7;
t_avds = 7;
t_avdh = 7;
t_avdp = 12;
t_wpl = 40;
t_wea = 15;
break;
}
tick_ns = gpmc_ticks_to_ns(1);
div = gpmc_cs_calc_divider(cs, min_gpmc_clk_period);
gpmc_clk_ns = div * tick_ns;
if (gpmc_clk_ns >= 24)
gpmc_clk_ns = gpmc_ticks_to_ns(div);
if (gpmc_clk_ns >= 25) /* 40 MHz*/
latency = 3;
else
latency = 4;
/* Configure OneNAND for sync read */
reg = omap2_onenand_readw(onenand_base + ONENAND_REG_SYS_CFG1);
reg &= ~((0x7 << ONENAND_SYS_CFG1_BRL_SHIFT) | (0x7 << 9));
reg |= (latency << ONENAND_SYS_CFG1_BRL_SHIFT) |
ONENAND_SYS_CFG1_SYNC_READ |
ONENAND_SYS_CFG1_BL_16;
omap2_onenand_writew(reg, onenand_base + ONENAND_REG_SYS_CFG1);
if (div == 1) {
reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG2);
reg |= (1 << 7);
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG2, reg);
reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG3);
reg |= (1 << 7);
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG3, reg);
reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG4);
reg |= (1 << 7);
reg |= (1 << 23);
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG4, reg);
} else {
reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG2);
reg &= ~(1 << 7);
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG2, reg);
reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG3);
reg &= ~(1 << 7);
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG3, reg);
reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG4);
reg &= ~(1 << 7);
reg &= ~(1 << 23);
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG4, reg);
}
/* FIXME: Get timings from platform data */
/* Set syncronous read timings */
memset(&t, 0, sizeof(t));
t.sync_clk = min_gpmc_clk_period;
t.cs_on = 0;
t.adv_on = gpmc_round_ns_to_ticks(7);
fclk_offset_ns = t.adv_on + gpmc_round_ns_to_ticks(7);
fclk_offset = fclk_offset_ns / gpmc_round_ns_to_ticks(1);
t.adv_on = 0;
fclk_offset_ns = gpmc_round_ns_to_ticks(max_t(int, t_ces, t_avds));
fclk_offset = gpmc_ns_to_ticks(fclk_offset_ns);
t.page_burst_access = gpmc_clk_ns;
/* Read */
t.adv_rd_off = fclk_offset_ns + gpmc_round_ns_to_ticks(7);
t.adv_rd_off = gpmc_ticks_to_ns(fclk_offset + gpmc_ns_to_ticks(t_avdh));
t.oe_on = t.adv_rd_off;
t.access = fclk_offset_ns + (latency + 1) * gpmc_clk_ns;
t.access = gpmc_ticks_to_ns(fclk_offset + (latency + 1) * div);
t.oe_off = t.access + gpmc_round_ns_to_ticks(1);
t.cs_rd_off = t.oe_off;
t.rd_cycle = t.cs_rd_off + gpmc_round_ns_to_ticks(17);
t.rd_cycle = gpmc_ticks_to_ns(fclk_offset + (latency + 1) * div + div);
/* Write */
t.adv_wr_off = t.adv_on + gpmc_round_ns_to_ticks(12);
t.we_on = t.adv_wr_off + gpmc_round_ns_to_ticks(1);
t.we_off = t.we_on + gpmc_round_ns_to_ticks(40);
t.adv_wr_off = t.adv_on + gpmc_round_ns_to_ticks(t_avdp);
t.we_on = t.adv_wr_off + gpmc_round_ns_to_ticks(t_avdh);
t.we_off = t.we_on + gpmc_round_ns_to_ticks(t_wpl);
t.cs_wr_off = t.we_off + gpmc_round_ns_to_ticks(1);
t.wr_cycle = t.cs_wr_off + gpmc_round_ns_to_ticks(1);
t.wr_cycle = t.we_off + gpmc_round_ns_to_ticks(t_wea);
/* Configure GPMC for synchronous read */
fclk_offset %= div;
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1,
GPMC_CONFIG1_WRAPBURST_SUPP |
GPMC_CONFIG1_READMULTIPLE_SUPP |
......@@ -111,16 +158,49 @@ static int omap2_onenand_set_sync_mode(int cs, void __iomem *onenand_base)
GPMC_CONFIG1_DEVICETYPE_NOR |
GPMC_CONFIG1_MUXADDDATA);
return gpmc_cs_set_timings(cs, &t);
err = gpmc_cs_set_timings(cs, &t);
if (err)
return err;
if (!freq) {
/* Very first call freq is not known */
reg = omap2_onenand_readw(onenand_base + ONENAND_REG_VERSION_ID);
switch ((reg >> 4) & 0xf) {
case 0:
freq = 40;
break;
case 1:
freq = 54;
break;
case 2:
freq = 66;
break;
case 3:
freq = 83;
break;
}
if (freq && freq != 54)
goto again;
}
/* Configure OneNAND for sync read */
reg = omap2_onenand_readw(onenand_base + ONENAND_REG_SYS_CFG1);
reg &= ~((0x7 << ONENAND_SYS_CFG1_BRL_SHIFT) | (0x7 << 9));
reg |= (latency << ONENAND_SYS_CFG1_BRL_SHIFT) |
ONENAND_SYS_CFG1_SYNC_READ |
ONENAND_SYS_CFG1_BL_16;
omap2_onenand_writew(reg, onenand_base + ONENAND_REG_SYS_CFG1);
return 0;
}
static int n800_onenand_setup(void __iomem *onenand_base)
static int n800_onenand_setup(void __iomem *onenand_base, int freq)
{
struct omap_onenand_platform_data *datap = &n800_onenand_data;
struct device *dev = &n800_onenand_device.dev;
/* Set sync timings in GPMC */
if (omap2_onenand_set_sync_mode(datap->cs, onenand_base) < 0) {
if (omap2_onenand_set_sync_mode(datap->cs, onenand_base, freq) < 0) {
dev_err(dev, "Unable to set synchronous mode\n");
return -EINVAL;
}
......
......@@ -117,6 +117,11 @@ unsigned int gpmc_ns_to_ticks(unsigned int time_ns)
return (time_ns * 1000 + tick_ps - 1) / tick_ps;
}
unsigned int gpmc_ticks_to_ns(unsigned int ticks)
{
return ticks * gpmc_get_fclk_period() / 1000;
}
unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns)
{
unsigned long ticks = gpmc_ns_to_ticks(time_ns);
......
......@@ -61,6 +61,8 @@ struct omap2_onenand {
struct completion irq_done;
struct completion dma_done;
int dma_channel;
int freq;
int (*setup)(void __iomem *base, int freq);
};
static unsigned short omap2_onenand_readw(void __iomem *addr)
......@@ -98,7 +100,23 @@ static int omap2_onenand_wait(struct mtd_info *mtd, int state)
u32 syscfg;
if (state == FL_RESETING) {
int i;
for (i = 0; i < 20; i++) {
udelay(1);
interrupt = omap2_onenand_readw(info->onenand.base + ONENAND_REG_INTERRUPT);
if (interrupt & ONENAND_INT_MASTER)
break;
}
ctrl = omap2_onenand_readw(info->onenand.base + ONENAND_REG_CTRL_STATUS);
if (ctrl & ONENAND_CTRL_ERROR) {
printk(KERN_ERR "onenand_wait: reset error! ctrl 0x%04x intr 0x%04x\n", ctrl, interrupt);
return -EIO;
}
if (!(interrupt & ONENAND_INT_RESET)) {
printk(KERN_ERR "onenand_wait: reset timeout! ctrl 0x%04x intr 0x%04x\n", ctrl, interrupt);
return -EIO;
}
return 0;
}
......@@ -164,7 +182,7 @@ retry:
printk(KERN_ERR "onenand_wait: controller error = 0x%04x\n", ctrl);
if (ctrl & ONENAND_CTRL_LOCK)
printk(KERN_ERR "onenand_erase: Device is write protected!!!\n");
return ctrl;
return -EIO;
}
if (ctrl & 0xFE9F)
......@@ -173,11 +191,12 @@ retry:
if (interrupt & ONENAND_INT_READ) {
int ecc = omap2_onenand_readw(info->onenand.base + ONENAND_REG_ECC_STATUS);
if (ecc) {
printk(KERN_ERR "onenand_wait: ECC error = 0x%04x\n", ecc);
if (ecc & ONENAND_ECC_2BIT_ALL) {
printk(KERN_ERR "onenand_wait: ECC error = 0x%04x\n", ecc);
mtd->ecc_stats.failed++;
return ecc;
return -EBADMSG;
} else if (ecc & ONENAND_ECC_1BIT_ALL)
printk(KERN_NOTICE "onenand_wait: correctable ECC error = 0x%04x\n", ecc);
mtd->ecc_stats.corrected++;
}
} else if (state == FL_READING) {
......@@ -289,6 +308,29 @@ static int omap2_onenand_write_bufferram(struct mtd_info *mtd, int area,
return 0;
}
static struct platform_driver omap2_onenand_driver;
static int __adjust_timing(struct device *dev, void *data)
{
int ret = 0;
struct omap2_onenand *info;
info = dev_get_drvdata(dev);
BUG_ON(info->setup == NULL);
/* DMA is not in use so this is all that is needed */
ret = info->setup(info->onenand.base, info->freq);
return ret;
}
int omap2_onenand_rephase(void)
{
return driver_for_each_device(&omap2_onenand_driver.driver, NULL,
NULL, __adjust_timing);
}
static void __devexit omap2_onenand_shutdown(struct platform_device *pdev)
{
struct omap2_onenand *info = dev_get_drvdata(&pdev->dev);
......@@ -346,11 +388,12 @@ static int __devinit omap2_onenand_probe(struct platform_device *pdev)
}
if (pdata->onenand_setup != NULL) {
r = pdata->onenand_setup(info->onenand.base);
r = pdata->onenand_setup(info->onenand.base, info->freq);
if (r < 0) {
dev_err(&pdev->dev, "Onenand platform setup failed: %d\n", r);
goto err_iounmap;
}
info->setup = pdata->onenand_setup;
}
if (info->gpio_irq) {
......@@ -401,6 +444,21 @@ static int __devinit omap2_onenand_probe(struct platform_device *pdev)
if ((r = onenand_scan(&info->mtd, 1)) < 0)
goto err_release_dma;
switch ((info->onenand.version_id >> 4) & 0xf) {
case 0:
info->freq = 40;
break;
case 1:
info->freq = 54;
break;
case 2:
info->freq = 66;
break;
case 3:
info->freq = 83;
break;
}
#ifdef CONFIG_MTD_PARTITIONS
if (pdata->parts != NULL)
r = add_mtd_partitions(&info->mtd, pdata->parts, pdata->nr_parts);
......
......@@ -87,6 +87,7 @@ struct gpmc_timings {
};
extern unsigned int gpmc_ns_to_ticks(unsigned int time_ns);
extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
extern unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns);
extern unsigned long gpmc_get_fclk_period(void);
......
......@@ -16,6 +16,8 @@ struct omap_onenand_platform_data {
int gpio_irq;
struct mtd_partition *parts;
int nr_parts;
int (*onenand_setup)(void __iomem *);
int (*onenand_setup)(void __iomem *, int freq);
int dma_channel;
};
int omap2_onenand_rephase(void);
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