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mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 02:32:09 -04:00
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Merge branch 'linux-2.6'

Browse source
This commit is contained in:
Paul Mackerras 2008-01-31 11:25:51 +11:00
commit bd45ac0c5d
4468 changed files with 353060 additions and 181806 deletions
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1
drivers/spi/Kconfig
View file

@ -153,6 +153,7 @@ config SPI_OMAP24XX
config SPI_PXA2XX
tristate "PXA2xx SSP SPI master"
depends on SPI_MASTER && ARCH_PXA && EXPERIMENTAL
select PXA_SSP
help
This enables using a PXA2xx SSP port as a SPI master controller.
The driver can be configured to use any SSP port and additional

6
drivers/spi/omap2_mcspi.c
View file

@ -350,6 +350,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
tx = xfer->tx_buf;
do {
c -= 1;
if (tx != NULL) {
if (mcspi_wait_for_reg_bit(chstat_reg,
OMAP2_MCSPI_CHSTAT_TXS) < 0) {
@ -380,7 +381,6 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
word_len, *(rx - 1));
#endif
}
c -= 1;
} while (c);
} else if (word_len <= 16) {
u16 *rx;
@ -389,6 +389,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
rx = xfer->rx_buf;
tx = xfer->tx_buf;
do {
c -= 2;
if (tx != NULL) {
if (mcspi_wait_for_reg_bit(chstat_reg,
OMAP2_MCSPI_CHSTAT_TXS) < 0) {
@ -419,7 +420,6 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
word_len, *(rx - 1));
#endif
}
c -= 2;
} while (c);
} else if (word_len <= 32) {
u32 *rx;
@ -428,6 +428,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
rx = xfer->rx_buf;
tx = xfer->tx_buf;
do {
c -= 4;
if (tx != NULL) {
if (mcspi_wait_for_reg_bit(chstat_reg,
OMAP2_MCSPI_CHSTAT_TXS) < 0) {
@ -458,7 +459,6 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
word_len, *(rx - 1));
#endif
}
c -= 4;
} while (c);
}

139
drivers/spi/pxa2xx_spi.c
View file

@ -27,6 +27,7 @@
#include <linux/spi/spi.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <asm/io.h>
#include <asm/irq.h>
@ -36,6 +37,8 @@
#include <asm/arch/hardware.h>
#include <asm/arch/pxa-regs.h>
#include <asm/arch/regs-ssp.h>
#include <asm/arch/ssp.h>
#include <asm/arch/pxa2xx_spi.h>
MODULE_AUTHOR("Stephen Street");
@ -80,6 +83,9 @@ struct driver_data {
/* Driver model hookup */
struct platform_device *pdev;
/* SSP Info */
struct ssp_device *ssp;
/* SPI framework hookup */
enum pxa_ssp_type ssp_type;
struct spi_master *master;
@ -778,6 +784,16 @@ int set_dma_burst_and_threshold(struct chip_data *chip, struct spi_device *spi,
return retval;
}
static unsigned int ssp_get_clk_div(struct ssp_device *ssp, int rate)
{
unsigned long ssp_clk = clk_get_rate(ssp->clk);
if (ssp->type == PXA25x_SSP)
return ((ssp_clk / (2 * rate) - 1) & 0xff) << 8;
else
return ((ssp_clk / rate - 1) & 0xfff) << 8;
}
static void pump_transfers(unsigned long data)
{
struct driver_data *drv_data = (struct driver_data *)data;
@ -785,6 +801,7 @@ static void pump_transfers(unsigned long data)
struct spi_transfer *transfer = NULL;
struct spi_transfer *previous = NULL;
struct chip_data *chip = NULL;
struct ssp_device *ssp = drv_data->ssp;
void *reg = drv_data->ioaddr;
u32 clk_div = 0;
u8 bits = 0;
@ -866,12 +883,7 @@ static void pump_transfers(unsigned long data)
if (transfer->bits_per_word)
bits = transfer->bits_per_word;
if (reg == SSP1_VIRT)
clk_div = SSP1_SerClkDiv(speed);
else if (reg == SSP2_VIRT)
clk_div = SSP2_SerClkDiv(speed);
else if (reg == SSP3_VIRT)
clk_div = SSP3_SerClkDiv(speed);
clk_div = ssp_get_clk_div(ssp, speed);
if (bits <= 8) {
drv_data->n_bytes = 1;
@ -1074,6 +1086,7 @@ static int setup(struct spi_device *spi)
struct pxa2xx_spi_chip *chip_info = NULL;
struct chip_data *chip;
struct driver_data *drv_data = spi_master_get_devdata(spi->master);
struct ssp_device *ssp = drv_data->ssp;
unsigned int clk_div;
if (!spi->bits_per_word)
@ -1157,18 +1170,7 @@ static int setup(struct spi_device *spi)
}
}
if (drv_data->ioaddr == SSP1_VIRT)
clk_div = SSP1_SerClkDiv(spi->max_speed_hz);
else if (drv_data->ioaddr == SSP2_VIRT)
clk_div = SSP2_SerClkDiv(spi->max_speed_hz);
else if (drv_data->ioaddr == SSP3_VIRT)
clk_div = SSP3_SerClkDiv(spi->max_speed_hz);
else
{
dev_err(&spi->dev, "failed setup: unknown IO address=0x%p\n",
drv_data->ioaddr);
return -ENODEV;
}
clk_div = ssp_get_clk_div(ssp, spi->max_speed_hz);
chip->speed_hz = spi->max_speed_hz;
chip->cr0 = clk_div
@ -1183,15 +1185,15 @@ static int setup(struct spi_device *spi)
/* NOTE: PXA25x_SSP _could_ use external clocking ... */
if (drv_data->ssp_type != PXA25x_SSP)
dev_dbg(&spi->dev, "%d bits/word, %d Hz, mode %d\n",
dev_dbg(&spi->dev, "%d bits/word, %ld Hz, mode %d\n",
spi->bits_per_word,
(CLOCK_SPEED_HZ)
clk_get_rate(ssp->clk)
/ (1 + ((chip->cr0 & SSCR0_SCR) >> 8)),
spi->mode & 0x3);
else
dev_dbg(&spi->dev, "%d bits/word, %d Hz, mode %d\n",
dev_dbg(&spi->dev, "%d bits/word, %ld Hz, mode %d\n",
spi->bits_per_word,
(CLOCK_SPEED_HZ/2)
clk_get_rate(ssp->clk)
/ (1 + ((chip->cr0 & SSCR0_SCR) >> 8)),
spi->mode & 0x3);
@ -1323,14 +1325,14 @@ static int __init pxa2xx_spi_probe(struct platform_device *pdev)
struct pxa2xx_spi_master *platform_info;
struct spi_master *master;
struct driver_data *drv_data = 0;
struct resource *memory_resource;
int irq;
struct ssp_device *ssp;
int status = 0;
platform_info = dev->platform_data;
if (platform_info->ssp_type == SSP_UNDEFINED) {
dev_err(&pdev->dev, "undefined SSP\n");
ssp = ssp_request(pdev->id, pdev->name);
if (ssp == NULL) {
dev_err(&pdev->dev, "failed to request SSP%d\n", pdev->id);
return -ENODEV;
}
@ -1338,12 +1340,14 @@ static int __init pxa2xx_spi_probe(struct platform_device *pdev)
master = spi_alloc_master(dev, sizeof(struct driver_data) + 16);
if (!master) {
dev_err(&pdev->dev, "can not alloc spi_master\n");
ssp_free(ssp);
return -ENOMEM;
}
drv_data = spi_master_get_devdata(master);
drv_data->master = master;
drv_data->master_info = platform_info;
drv_data->pdev = pdev;
drv_data->ssp = ssp;
master->bus_num = pdev->id;
master->num_chipselect = platform_info->num_chipselect;
@ -1351,21 +1355,13 @@ static int __init pxa2xx_spi_probe(struct platform_device *pdev)
master->setup = setup;
master->transfer = transfer;
drv_data->ssp_type = platform_info->ssp_type;
drv_data->ssp_type = ssp->type;
drv_data->null_dma_buf = (u32 *)ALIGN((u32)(drv_data +
sizeof(struct driver_data)), 8);
/* Setup register addresses */
memory_resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!memory_resource) {
dev_err(&pdev->dev, "memory resources not defined\n");
status = -ENODEV;
goto out_error_master_alloc;
}
drv_data->ioaddr = (void *)io_p2v((unsigned long)(memory_resource->start));
drv_data->ssdr_physical = memory_resource->start + 0x00000010;
if (platform_info->ssp_type == PXA25x_SSP) {
drv_data->ioaddr = ssp->mmio_base;
drv_data->ssdr_physical = ssp->phys_base + SSDR;
if (ssp->type == PXA25x_SSP) {
drv_data->int_cr1 = SSCR1_TIE | SSCR1_RIE;
drv_data->dma_cr1 = 0;
drv_data->clear_sr = SSSR_ROR;
@ -1377,15 +1373,7 @@ static int __init pxa2xx_spi_probe(struct platform_device *pdev)
drv_data->mask_sr = SSSR_TINT | SSSR_RFS | SSSR_TFS | SSSR_ROR;
}
/* Attach to IRQ */
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "irq resource not defined\n");
status = -ENODEV;
goto out_error_master_alloc;
}
status = request_irq(irq, ssp_int, 0, dev->bus_id, drv_data);
status = request_irq(ssp->irq, ssp_int, 0, dev->bus_id, drv_data);
if (status < 0) {
dev_err(&pdev->dev, "can not get IRQ\n");
goto out_error_master_alloc;
@ -1418,29 +1406,12 @@ static int __init pxa2xx_spi_probe(struct platform_device *pdev)
goto out_error_dma_alloc;
}
if (drv_data->ioaddr == SSP1_VIRT) {
DRCMRRXSSDR = DRCMR_MAPVLD
| drv_data->rx_channel;
DRCMRTXSSDR = DRCMR_MAPVLD
| drv_data->tx_channel;
} else if (drv_data->ioaddr == SSP2_VIRT) {
DRCMRRXSS2DR = DRCMR_MAPVLD
| drv_data->rx_channel;
DRCMRTXSS2DR = DRCMR_MAPVLD
| drv_data->tx_channel;
} else if (drv_data->ioaddr == SSP3_VIRT) {
DRCMRRXSS3DR = DRCMR_MAPVLD
| drv_data->rx_channel;
DRCMRTXSS3DR = DRCMR_MAPVLD
| drv_data->tx_channel;
} else {
dev_err(dev, "bad SSP type\n");
goto out_error_dma_alloc;
}
DRCMR(ssp->drcmr_rx) = DRCMR_MAPVLD | drv_data->rx_channel;
DRCMR(ssp->drcmr_tx) = DRCMR_MAPVLD | drv_data->tx_channel;
}
/* Enable SOC clock */
pxa_set_cken(platform_info->clock_enable, 1);
clk_enable(ssp->clk);
/* Load default SSP configuration */
write_SSCR0(0, drv_data->ioaddr);
@ -1479,7 +1450,7 @@ out_error_queue_alloc:
destroy_queue(drv_data);
out_error_clock_enabled:
pxa_set_cken(platform_info->clock_enable, 0);
clk_disable(ssp->clk);
out_error_dma_alloc:
if (drv_data->tx_channel != -1)
@ -1488,17 +1459,18 @@ out_error_dma_alloc:
pxa_free_dma(drv_data->rx_channel);
out_error_irq_alloc:
free_irq(irq, drv_data);
free_irq(ssp->irq, drv_data);
out_error_master_alloc:
spi_master_put(master);
ssp_free(ssp);
return status;
}
static int pxa2xx_spi_remove(struct platform_device *pdev)
{
struct driver_data *drv_data = platform_get_drvdata(pdev);
int irq;
struct ssp_device *ssp = drv_data->ssp;
int status = 0;
if (!drv_data)
@ -1520,28 +1492,21 @@ static int pxa2xx_spi_remove(struct platform_device *pdev)
/* Disable the SSP at the peripheral and SOC level */
write_SSCR0(0, drv_data->ioaddr);
pxa_set_cken(drv_data->master_info->clock_enable, 0);
clk_disable(ssp->clk);
/* Release DMA */
if (drv_data->master_info->enable_dma) {
if (drv_data->ioaddr == SSP1_VIRT) {
DRCMRRXSSDR = 0;
DRCMRTXSSDR = 0;
} else if (drv_data->ioaddr == SSP2_VIRT) {
DRCMRRXSS2DR = 0;
DRCMRTXSS2DR = 0;
} else if (drv_data->ioaddr == SSP3_VIRT) {
DRCMRRXSS3DR = 0;
DRCMRTXSS3DR = 0;
}
DRCMR(ssp->drcmr_rx) = 0;
DRCMR(ssp->drcmr_tx) = 0;
pxa_free_dma(drv_data->tx_channel);
pxa_free_dma(drv_data->rx_channel);
}
/* Release IRQ */
irq = platform_get_irq(pdev, 0);
if (irq >= 0)
free_irq(irq, drv_data);
free_irq(ssp->irq, drv_data);
/* Release SSP */
ssp_free(ssp);
/* Disconnect from the SPI framework */
spi_unregister_master(drv_data->master);
@ -1576,6 +1541,7 @@ static int suspend_devices(struct device *dev, void *pm_message)
static int pxa2xx_spi_suspend(struct platform_device *pdev, pm_message_t state)
{
struct driver_data *drv_data = platform_get_drvdata(pdev);
struct ssp_device *ssp = drv_data->ssp;
int status = 0;
/* Check all childern for current power state */
@ -1588,7 +1554,7 @@ static int pxa2xx_spi_suspend(struct platform_device *pdev, pm_message_t state)
if (status != 0)
return status;
write_SSCR0(0, drv_data->ioaddr);
pxa_set_cken(drv_data->master_info->clock_enable, 0);
clk_disable(ssp->clk);
return 0;
}
@ -1596,10 +1562,11 @@ static int pxa2xx_spi_suspend(struct platform_device *pdev, pm_message_t state)
static int pxa2xx_spi_resume(struct platform_device *pdev)
{
struct driver_data *drv_data = platform_get_drvdata(pdev);
struct ssp_device *ssp = drv_data->ssp;
int status = 0;
/* Enable the SSP clock */
pxa_set_cken(drv_data->master_info->clock_enable, 1);
clk_disable(ssp->clk);
/* Start the queue running */
status = start_queue(drv_data);

24
drivers/spi/spi.c
View file

@ -485,6 +485,15 @@ void spi_unregister_master(struct spi_master *master)
}
EXPORT_SYMBOL_GPL(spi_unregister_master);
static int __spi_master_match(struct device *dev, void *data)
{
struct spi_master *m;
u16 *bus_num = data;
m = container_of(dev, struct spi_master, dev);
return m->bus_num == *bus_num;
}
/**
* spi_busnum_to_master - look up master associated with bus_num
* @bus_num: the master's bus number
@ -499,17 +508,12 @@ struct spi_master *spi_busnum_to_master(u16 bus_num)
{
struct device *dev;
struct spi_master *master = NULL;
struct spi_master *m;
down(&spi_master_class.sem);
list_for_each_entry(dev, &spi_master_class.children, node) {
m = container_of(dev, struct spi_master, dev);
if (m->bus_num == bus_num) {
master = spi_master_get(m);
break;
}
}
up(&spi_master_class.sem);
dev = class_find_device(&spi_master_class, &bus_num,
__spi_master_match);
if (dev)
master = container_of(dev, struct spi_master, dev);
/* reference got in class_find_device */
return master;
}
EXPORT_SYMBOL_GPL(spi_busnum_to_master);