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path: root/drivers/spi/omap2_mcspi.c
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Diffstat (limited to 'drivers/spi/omap2_mcspi.c')
-rw-r--r--drivers/spi/omap2_mcspi.c222
1 files changed, 68 insertions, 154 deletions
diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c
index abb1ffbf3d2..36501adc125 100644
--- a/drivers/spi/omap2_mcspi.c
+++ b/drivers/spi/omap2_mcspi.c
@@ -3,7 +3,7 @@
*
* Copyright (C) 2005, 2006 Nokia Corporation
* Author: Samuel Ortiz <samuel.ortiz@nokia.com> and
- * Juha Yrjölä <juha.yrjola@nokia.com>
+ * Juha Yrj�l� <juha.yrjola@nokia.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -33,6 +33,7 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/slab.h>
+#include <linux/pm_runtime.h>
#include <linux/spi/spi.h>
@@ -46,7 +47,6 @@
#define OMAP2_MCSPI_MAX_CTRL 4
#define OMAP2_MCSPI_REVISION 0x00
-#define OMAP2_MCSPI_SYSCONFIG 0x10
#define OMAP2_MCSPI_SYSSTATUS 0x14
#define OMAP2_MCSPI_IRQSTATUS 0x18
#define OMAP2_MCSPI_IRQENABLE 0x1c
@@ -63,13 +63,6 @@
/* per-register bitmasks: */
-#define OMAP2_MCSPI_SYSCONFIG_SMARTIDLE BIT(4)
-#define OMAP2_MCSPI_SYSCONFIG_ENAWAKEUP BIT(2)
-#define OMAP2_MCSPI_SYSCONFIG_AUTOIDLE BIT(0)
-#define OMAP2_MCSPI_SYSCONFIG_SOFTRESET BIT(1)
-
-#define OMAP2_MCSPI_SYSSTATUS_RESETDONE BIT(0)
-
#define OMAP2_MCSPI_MODULCTRL_SINGLE BIT(0)
#define OMAP2_MCSPI_MODULCTRL_MS BIT(2)
#define OMAP2_MCSPI_MODULCTRL_STEST BIT(3)
@@ -122,13 +115,12 @@ struct omap2_mcspi {
spinlock_t lock;
struct list_head msg_queue;
struct spi_master *master;
- struct clk *ick;
- struct clk *fck;
/* Virtual base address of the controller */
void __iomem *base;
unsigned long phys;
/* SPI1 has 4 channels, while SPI2 has 2 */
struct omap2_mcspi_dma *dma_channels;
+ struct device *dev;
};
struct omap2_mcspi_cs {
@@ -144,7 +136,6 @@ struct omap2_mcspi_cs {
* corresponding registers are modified.
*/
struct omap2_mcspi_regs {
- u32 sysconfig;
u32 modulctrl;
u32 wakeupenable;
struct list_head cs;
@@ -268,9 +259,6 @@ static void omap2_mcspi_restore_ctx(struct omap2_mcspi *mcspi)
mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_MODULCTRL,
omap2_mcspi_ctx[spi_cntrl->bus_num - 1].modulctrl);
- mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_SYSCONFIG,
- omap2_mcspi_ctx[spi_cntrl->bus_num - 1].sysconfig);
-
mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_WAKEUPENABLE,
omap2_mcspi_ctx[spi_cntrl->bus_num - 1].wakeupenable);
@@ -280,20 +268,12 @@ static void omap2_mcspi_restore_ctx(struct omap2_mcspi *mcspi)
}
static void omap2_mcspi_disable_clocks(struct omap2_mcspi *mcspi)
{
- clk_disable(mcspi->ick);
- clk_disable(mcspi->fck);
+ pm_runtime_put_sync(mcspi->dev);
}
static int omap2_mcspi_enable_clocks(struct omap2_mcspi *mcspi)
{
- if (clk_enable(mcspi->ick))
- return -ENODEV;
- if (clk_enable(mcspi->fck))
- return -ENODEV;
-
- omap2_mcspi_restore_ctx(mcspi);
-
- return 0;
+ return pm_runtime_get_sync(mcspi->dev);
}
static int mcspi_wait_for_reg_bit(void __iomem *reg, unsigned long bit)
@@ -819,8 +799,9 @@ static int omap2_mcspi_setup(struct spi_device *spi)
return ret;
}
- if (omap2_mcspi_enable_clocks(mcspi))
- return -ENODEV;
+ ret = omap2_mcspi_enable_clocks(mcspi);
+ if (ret < 0)
+ return ret;
ret = omap2_mcspi_setup_transfer(spi, NULL);
omap2_mcspi_disable_clocks(mcspi);
@@ -863,10 +844,11 @@ static void omap2_mcspi_work(struct work_struct *work)
struct omap2_mcspi *mcspi;
mcspi = container_of(work, struct omap2_mcspi, work);
- spin_lock_irq(&mcspi->lock);
- if (omap2_mcspi_enable_clocks(mcspi))
- goto out;
+ if (omap2_mcspi_enable_clocks(mcspi) < 0)
+ return;
+
+ spin_lock_irq(&mcspi->lock);
/* We only enable one channel at a time -- the one whose message is
* at the head of the queue -- although this controller would gladly
@@ -979,10 +961,9 @@ static void omap2_mcspi_work(struct work_struct *work)
spin_lock_irq(&mcspi->lock);
}
- omap2_mcspi_disable_clocks(mcspi);
-
-out:
spin_unlock_irq(&mcspi->lock);
+
+ omap2_mcspi_disable_clocks(mcspi);
}
static int omap2_mcspi_transfer(struct spi_device *spi, struct spi_message *m)
@@ -1058,25 +1039,15 @@ static int omap2_mcspi_transfer(struct spi_device *spi, struct spi_message *m)
return 0;
}
-static int __init omap2_mcspi_reset(struct omap2_mcspi *mcspi)
+static int __init omap2_mcspi_master_setup(struct omap2_mcspi *mcspi)
{
struct spi_master *master = mcspi->master;
u32 tmp;
+ int ret = 0;
- if (omap2_mcspi_enable_clocks(mcspi))
- return -1;
-
- mcspi_write_reg(master, OMAP2_MCSPI_SYSCONFIG,
- OMAP2_MCSPI_SYSCONFIG_SOFTRESET);
- do {
- tmp = mcspi_read_reg(master, OMAP2_MCSPI_SYSSTATUS);
- } while (!(tmp & OMAP2_MCSPI_SYSSTATUS_RESETDONE));
-
- tmp = OMAP2_MCSPI_SYSCONFIG_AUTOIDLE |
- OMAP2_MCSPI_SYSCONFIG_ENAWAKEUP |
- OMAP2_MCSPI_SYSCONFIG_SMARTIDLE;
- mcspi_write_reg(master, OMAP2_MCSPI_SYSCONFIG, tmp);
- omap2_mcspi_ctx[master->bus_num - 1].sysconfig = tmp;
+ ret = omap2_mcspi_enable_clocks(mcspi);
+ if (ret < 0)
+ return ret;
tmp = OMAP2_MCSPI_WAKEUPENABLE_WKEN;
mcspi_write_reg(master, OMAP2_MCSPI_WAKEUPENABLE, tmp);
@@ -1087,91 +1058,26 @@ static int __init omap2_mcspi_reset(struct omap2_mcspi *mcspi)
return 0;
}
-static u8 __initdata spi1_rxdma_id [] = {
- OMAP24XX_DMA_SPI1_RX0,
- OMAP24XX_DMA_SPI1_RX1,
- OMAP24XX_DMA_SPI1_RX2,
- OMAP24XX_DMA_SPI1_RX3,
-};
-
-static u8 __initdata spi1_txdma_id [] = {
- OMAP24XX_DMA_SPI1_TX0,
- OMAP24XX_DMA_SPI1_TX1,
- OMAP24XX_DMA_SPI1_TX2,
- OMAP24XX_DMA_SPI1_TX3,
-};
-
-static u8 __initdata spi2_rxdma_id[] = {
- OMAP24XX_DMA_SPI2_RX0,
- OMAP24XX_DMA_SPI2_RX1,
-};
-
-static u8 __initdata spi2_txdma_id[] = {
- OMAP24XX_DMA_SPI2_TX0,
- OMAP24XX_DMA_SPI2_TX1,
-};
-
-#if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3) \
- || defined(CONFIG_ARCH_OMAP4)
-static u8 __initdata spi3_rxdma_id[] = {
- OMAP24XX_DMA_SPI3_RX0,
- OMAP24XX_DMA_SPI3_RX1,
-};
+static int omap_mcspi_runtime_resume(struct device *dev)
+{
+ struct omap2_mcspi *mcspi;
+ struct spi_master *master;
-static u8 __initdata spi3_txdma_id[] = {
- OMAP24XX_DMA_SPI3_TX0,
- OMAP24XX_DMA_SPI3_TX1,
-};
-#endif
+ master = dev_get_drvdata(dev);
+ mcspi = spi_master_get_devdata(master);
+ omap2_mcspi_restore_ctx(mcspi);
-#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
-static u8 __initdata spi4_rxdma_id[] = {
- OMAP34XX_DMA_SPI4_RX0,
-};
+ return 0;
+}
-static u8 __initdata spi4_txdma_id[] = {
- OMAP34XX_DMA_SPI4_TX0,
-};
-#endif
static int __init omap2_mcspi_probe(struct platform_device *pdev)
{
struct spi_master *master;
+ struct omap2_mcspi_platform_config *pdata = pdev->dev.platform_data;
struct omap2_mcspi *mcspi;
struct resource *r;
int status = 0, i;
- const u8 *rxdma_id, *txdma_id;
- unsigned num_chipselect;
-
- switch (pdev->id) {
- case 1:
- rxdma_id = spi1_rxdma_id;
- txdma_id = spi1_txdma_id;
- num_chipselect = 4;
- break;
- case 2:
- rxdma_id = spi2_rxdma_id;
- txdma_id = spi2_txdma_id;
- num_chipselect = 2;
- break;
-#if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3) \
- || defined(CONFIG_ARCH_OMAP4)
- case 3:
- rxdma_id = spi3_rxdma_id;
- txdma_id = spi3_txdma_id;
- num_chipselect = 2;
- break;
-#endif
-#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
- case 4:
- rxdma_id = spi4_rxdma_id;
- txdma_id = spi4_txdma_id;
- num_chipselect = 1;
- break;
-#endif
- default:
- return -EINVAL;
- }
master = spi_alloc_master(&pdev->dev, sizeof *mcspi);
if (master == NULL) {
@@ -1188,7 +1094,7 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev)
master->setup = omap2_mcspi_setup;
master->transfer = omap2_mcspi_transfer;
master->cleanup = omap2_mcspi_cleanup;
- master->num_chipselect = num_chipselect;
+ master->num_chipselect = pdata->num_cs;
dev_set_drvdata(&pdev->dev, master);
@@ -1206,49 +1112,62 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev)
goto err1;
}
+ r->start += pdata->regs_offset;
+ r->end += pdata->regs_offset;
mcspi->phys = r->start;
mcspi->base = ioremap(r->start, r->end - r->start + 1);
if (!mcspi->base) {
dev_dbg(&pdev->dev, "can't ioremap MCSPI\n");
status = -ENOMEM;
- goto err1aa;
+ goto err2;
}
+ mcspi->dev = &pdev->dev;
INIT_WORK(&mcspi->work, omap2_mcspi_work);
spin_lock_init(&mcspi->lock);
INIT_LIST_HEAD(&mcspi->msg_queue);
INIT_LIST_HEAD(&omap2_mcspi_ctx[master->bus_num - 1].cs);
- mcspi->ick = clk_get(&pdev->dev, "ick");
- if (IS_ERR(mcspi->ick)) {
- dev_dbg(&pdev->dev, "can't get mcspi_ick\n");
- status = PTR_ERR(mcspi->ick);
- goto err1a;
- }
- mcspi->fck = clk_get(&pdev->dev, "fck");
- if (IS_ERR(mcspi->fck)) {
- dev_dbg(&pdev->dev, "can't get mcspi_fck\n");
- status = PTR_ERR(mcspi->fck);
- goto err2;
- }
-
mcspi->dma_channels = kcalloc(master->num_chipselect,
sizeof(struct omap2_mcspi_dma),
GFP_KERNEL);
if (mcspi->dma_channels == NULL)
- goto err3;
+ goto err2;
+
+ for (i = 0; i < master->num_chipselect; i++) {
+ char dma_ch_name[14];
+ struct resource *dma_res;
+
+ sprintf(dma_ch_name, "rx%d", i);
+ dma_res = platform_get_resource_byname(pdev, IORESOURCE_DMA,
+ dma_ch_name);
+ if (!dma_res) {
+ dev_dbg(&pdev->dev, "cannot get DMA RX channel\n");
+ status = -ENODEV;
+ break;
+ }
- for (i = 0; i < num_chipselect; i++) {
mcspi->dma_channels[i].dma_rx_channel = -1;
- mcspi->dma_channels[i].dma_rx_sync_dev = rxdma_id[i];
+ mcspi->dma_channels[i].dma_rx_sync_dev = dma_res->start;
+ sprintf(dma_ch_name, "tx%d", i);
+ dma_res = platform_get_resource_byname(pdev, IORESOURCE_DMA,
+ dma_ch_name);
+ if (!dma_res) {
+ dev_dbg(&pdev->dev, "cannot get DMA TX channel\n");
+ status = -ENODEV;
+ break;
+ }
+
mcspi->dma_channels[i].dma_tx_channel = -1;
- mcspi->dma_channels[i].dma_tx_sync_dev = txdma_id[i];
+ mcspi->dma_channels[i].dma_tx_sync_dev = dma_res->start;
}
- if (omap2_mcspi_reset(mcspi) < 0)
- goto err4;
+ pm_runtime_enable(&pdev->dev);
+
+ if (status || omap2_mcspi_master_setup(mcspi) < 0)
+ goto err3;
status = spi_register_master(master);
if (status < 0)
@@ -1257,17 +1176,13 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev)
return status;
err4:
- kfree(mcspi->dma_channels);
+ spi_master_put(master);
err3:
- clk_put(mcspi->fck);
+ kfree(mcspi->dma_channels);
err2:
- clk_put(mcspi->ick);
-err1a:
- iounmap(mcspi->base);
-err1aa:
release_mem_region(r->start, (r->end - r->start) + 1);
+ iounmap(mcspi->base);
err1:
- spi_master_put(master);
return status;
}
@@ -1283,9 +1198,7 @@ static int __exit omap2_mcspi_remove(struct platform_device *pdev)
mcspi = spi_master_get_devdata(master);
dma_channels = mcspi->dma_channels;
- clk_put(mcspi->fck);
- clk_put(mcspi->ick);
-
+ omap2_mcspi_disable_clocks(mcspi);
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(r->start, (r->end - r->start) + 1);
@@ -1336,6 +1249,7 @@ static int omap2_mcspi_resume(struct device *dev)
static const struct dev_pm_ops omap2_mcspi_pm_ops = {
.resume = omap2_mcspi_resume,
+ .runtime_resume = omap_mcspi_runtime_resume,
};
static struct platform_driver omap2_mcspi_driver = {
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-23 11:08:45 +0000