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path: root/drivers/mfd/mcp-sa11x0.c
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Diffstat (limited to 'drivers/mfd/mcp-sa11x0.c')
-rw-r--r--drivers/mfd/mcp-sa11x0.c199
1 files changed, 127 insertions, 72 deletions
diff --git a/drivers/mfd/mcp-sa11x0.c b/drivers/mfd/mcp-sa11x0.c
index 02c53a0766c4..c54e244ca0cf 100644
--- a/drivers/mfd/mcp-sa11x0.c
+++ b/drivers/mfd/mcp-sa11x0.c
@@ -13,51 +13,60 @@
*/
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/io.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
+#include <linux/pm.h>
#include <linux/mfd/mcp.h>
-#include <mach/dma.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
-#include <asm/system.h>
#include <mach/mcp.h>
-#include <mach/assabet.h>
-
+#define DRIVER_NAME "sa11x0-mcp"
struct mcp_sa11x0 {
- u32 mccr0;
- u32 mccr1;
+ void __iomem *base0;
+ void __iomem *base1;
+ u32 mccr0;
+ u32 mccr1;
};
+/* Register offsets */
+#define MCCR0(m) ((m)->base0 + 0x00)
+#define MCDR0(m) ((m)->base0 + 0x08)
+#define MCDR1(m) ((m)->base0 + 0x0c)
+#define MCDR2(m) ((m)->base0 + 0x10)
+#define MCSR(m) ((m)->base0 + 0x18)
+#define MCCR1(m) ((m)->base1 + 0x00)
+
#define priv(mcp) ((struct mcp_sa11x0 *)mcp_priv(mcp))
static void
mcp_sa11x0_set_telecom_divisor(struct mcp *mcp, unsigned int divisor)
{
- unsigned int mccr0;
+ struct mcp_sa11x0 *m = priv(mcp);
divisor /= 32;
- mccr0 = Ser4MCCR0 & ~0x00007f00;
- mccr0 |= divisor << 8;
- Ser4MCCR0 = mccr0;
+ m->mccr0 &= ~0x00007f00;
+ m->mccr0 |= divisor << 8;
+ writel_relaxed(m->mccr0, MCCR0(m));
}
static void
mcp_sa11x0_set_audio_divisor(struct mcp *mcp, unsigned int divisor)
{
- unsigned int mccr0;
+ struct mcp_sa11x0 *m = priv(mcp);
divisor /= 32;
- mccr0 = Ser4MCCR0 & ~0x0000007f;
- mccr0 |= divisor;
- Ser4MCCR0 = mccr0;
+ m->mccr0 &= ~0x0000007f;
+ m->mccr0 |= divisor;
+ writel_relaxed(m->mccr0, MCCR0(m));
}
/*
@@ -69,14 +78,15 @@ mcp_sa11x0_set_audio_divisor(struct mcp *mcp, unsigned int divisor)
static void
mcp_sa11x0_write(struct mcp *mcp, unsigned int reg, unsigned int val)
{
+ struct mcp_sa11x0 *m = priv(mcp);
int ret = -ETIME;
int i;
- Ser4MCDR2 = reg << 17 | MCDR2_Wr | (val & 0xffff);
+ writel_relaxed(reg << 17 | MCDR2_Wr | (val & 0xffff), MCDR2(m));
for (i = 0; i < 2; i++) {
udelay(mcp->rw_timeout);
- if (Ser4MCSR & MCSR_CWC) {
+ if (readl_relaxed(MCSR(m)) & MCSR_CWC) {
ret = 0;
break;
}
@@ -95,15 +105,16 @@ mcp_sa11x0_write(struct mcp *mcp, unsigned int reg, unsigned int val)
static unsigned int
mcp_sa11x0_read(struct mcp *mcp, unsigned int reg)
{
+ struct mcp_sa11x0 *m = priv(mcp);
int ret = -ETIME;
int i;
- Ser4MCDR2 = reg << 17 | MCDR2_Rd;
+ writel_relaxed(reg << 17 | MCDR2_Rd, MCDR2(m));
for (i = 0; i < 2; i++) {
udelay(mcp->rw_timeout);
- if (Ser4MCSR & MCSR_CRC) {
- ret = Ser4MCDR2 & 0xffff;
+ if (readl_relaxed(MCSR(m)) & MCSR_CRC) {
+ ret = readl_relaxed(MCDR2(m)) & 0xffff;
break;
}
}
@@ -116,13 +127,19 @@ mcp_sa11x0_read(struct mcp *mcp, unsigned int reg)
static void mcp_sa11x0_enable(struct mcp *mcp)
{
- Ser4MCSR = -1;
- Ser4MCCR0 |= MCCR0_MCE;
+ struct mcp_sa11x0 *m = priv(mcp);
+
+ writel(-1, MCSR(m));
+ m->mccr0 |= MCCR0_MCE;
+ writel_relaxed(m->mccr0, MCCR0(m));
}
static void mcp_sa11x0_disable(struct mcp *mcp)
{
- Ser4MCCR0 &= ~MCCR0_MCE;
+ struct mcp_sa11x0 *m = priv(mcp);
+
+ m->mccr0 &= ~MCCR0_MCE;
+ writel_relaxed(m->mccr0, MCCR0(m));
}
/*
@@ -137,55 +154,64 @@ static struct mcp_ops mcp_sa11x0 = {
.disable = mcp_sa11x0_disable,
};
-static int mcp_sa11x0_probe(struct platform_device *pdev)
+static int mcp_sa11x0_probe(struct platform_device *dev)
{
- struct mcp_plat_data *data = pdev->dev.platform_data;
+ struct mcp_plat_data *data = dev->dev.platform_data;
+ struct resource *mem0, *mem1;
+ struct mcp_sa11x0 *m;
struct mcp *mcp;
int ret;
if (!data)
return -ENODEV;
- if (!request_mem_region(0x80060000, 0x60, "sa11x0-mcp"))
- return -EBUSY;
+ mem0 = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ mem1 = platform_get_resource(dev, IORESOURCE_MEM, 1);
+ if (!mem0 || !mem1)
+ return -ENXIO;
+
+ if (!request_mem_region(mem0->start, resource_size(mem0),
+ DRIVER_NAME)) {
+ ret = -EBUSY;
+ goto err_mem0;
+ }
- mcp = mcp_host_alloc(&pdev->dev, sizeof(struct mcp_sa11x0));
+ if (!request_mem_region(mem1->start, resource_size(mem1),
+ DRIVER_NAME)) {
+ ret = -EBUSY;
+ goto err_mem1;
+ }
+
+ mcp = mcp_host_alloc(&dev->dev, sizeof(struct mcp_sa11x0));
if (!mcp) {
ret = -ENOMEM;
- goto release;
+ goto err_alloc;
}
mcp->owner = THIS_MODULE;
mcp->ops = &mcp_sa11x0;
mcp->sclk_rate = data->sclk_rate;
- mcp->dma_audio_rd = DMA_Ser4MCP0Rd;
- mcp->dma_audio_wr = DMA_Ser4MCP0Wr;
- mcp->dma_telco_rd = DMA_Ser4MCP1Rd;
- mcp->dma_telco_wr = DMA_Ser4MCP1Wr;
- mcp->gpio_base = data->gpio_base;
- platform_set_drvdata(pdev, mcp);
+ m = priv(mcp);
+ m->mccr0 = data->mccr0 | 0x7f7f;
+ m->mccr1 = data->mccr1;
- if (machine_is_assabet()) {
- ASSABET_BCR_set(ASSABET_BCR_CODEC_RST);
+ m->base0 = ioremap(mem0->start, resource_size(mem0));
+ m->base1 = ioremap(mem1->start, resource_size(mem1));
+ if (!m->base0 || !m->base1) {
+ ret = -ENOMEM;
+ goto err_ioremap;
}
- /*
- * Setup the PPC unit correctly.
- */
- PPDR &= ~PPC_RXD4;
- PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
- PSDR |= PPC_RXD4;
- PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
- PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
+ platform_set_drvdata(dev, mcp);
/*
* Initialise device. Note that we initially
* set the sampling rate to minimum.
*/
- Ser4MCSR = -1;
- Ser4MCCR1 = data->mccr1;
- Ser4MCCR0 = data->mccr0 | 0x7f7f;
+ writel_relaxed(-1, MCSR(m));
+ writel_relaxed(m->mccr1, MCCR1(m));
+ writel_relaxed(m->mccr0, MCCR0(m));
/*
* Calculate the read/write timeout (us) from the bit clock
@@ -195,62 +221,90 @@ static int mcp_sa11x0_probe(struct platform_device *pdev)
mcp->rw_timeout = (64 * 3 * 1000000 + mcp->sclk_rate - 1) /
mcp->sclk_rate;
- ret = mcp_host_register(mcp);
+ ret = mcp_host_add(mcp, data->codec_pdata);
if (ret == 0)
- goto out;
+ return 0;
- release:
- release_mem_region(0x80060000, 0x60);
- platform_set_drvdata(pdev, NULL);
+ platform_set_drvdata(dev, NULL);
- out:
+ err_ioremap:
+ iounmap(m->base1);
+ iounmap(m->base0);
+ mcp_host_free(mcp);
+ err_alloc:
+ release_mem_region(mem1->start, resource_size(mem1));
+ err_mem1:
+ release_mem_region(mem0->start, resource_size(mem0));
+ err_mem0:
return ret;
}
static int mcp_sa11x0_remove(struct platform_device *dev)
{
struct mcp *mcp = platform_get_drvdata(dev);
+ struct mcp_sa11x0 *m = priv(mcp);
+ struct resource *mem0, *mem1;
+
+ if (m->mccr0 & MCCR0_MCE)
+ dev_warn(&dev->dev,
+ "device left active (missing disable call?)\n");
+
+ mem0 = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ mem1 = platform_get_resource(dev, IORESOURCE_MEM, 1);
platform_set_drvdata(dev, NULL);
- mcp_host_unregister(mcp);
- release_mem_region(0x80060000, 0x60);
+ mcp_host_del(mcp);
+ iounmap(m->base1);
+ iounmap(m->base0);
+ mcp_host_free(mcp);
+ release_mem_region(mem1->start, resource_size(mem1));
+ release_mem_region(mem0->start, resource_size(mem0));
return 0;
}
-static int mcp_sa11x0_suspend(struct platform_device *dev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int mcp_sa11x0_suspend(struct device *dev)
{
- struct mcp *mcp = platform_get_drvdata(dev);
+ struct mcp_sa11x0 *m = priv(dev_get_drvdata(dev));
+
+ if (m->mccr0 & MCCR0_MCE)
+ dev_warn(dev, "device left active (missing disable call?)\n");
- priv(mcp)->mccr0 = Ser4MCCR0;
- priv(mcp)->mccr1 = Ser4MCCR1;
- Ser4MCCR0 &= ~MCCR0_MCE;
+ writel(m->mccr0 & ~MCCR0_MCE, MCCR0(m));
return 0;
}
-static int mcp_sa11x0_resume(struct platform_device *dev)
+static int mcp_sa11x0_resume(struct device *dev)
{
- struct mcp *mcp = platform_get_drvdata(dev);
+ struct mcp_sa11x0 *m = priv(dev_get_drvdata(dev));
- Ser4MCCR1 = priv(mcp)->mccr1;
- Ser4MCCR0 = priv(mcp)->mccr0;
+ writel_relaxed(m->mccr1, MCCR1(m));
+ writel_relaxed(m->mccr0, MCCR0(m));
return 0;
}
-
-/*
- * The driver for the SA11x0 MCP port.
- */
-MODULE_ALIAS("platform:sa11x0-mcp");
+#endif
+
+static const struct dev_pm_ops mcp_sa11x0_pm_ops = {
+#ifdef CONFIG_PM_SLEEP
+ .suspend = mcp_sa11x0_suspend,
+ .freeze = mcp_sa11x0_suspend,
+ .poweroff = mcp_sa11x0_suspend,
+ .resume_noirq = mcp_sa11x0_resume,
+ .thaw_noirq = mcp_sa11x0_resume,
+ .restore_noirq = mcp_sa11x0_resume,
+#endif
+};
static struct platform_driver mcp_sa11x0_driver = {
.probe = mcp_sa11x0_probe,
.remove = mcp_sa11x0_remove,
- .suspend = mcp_sa11x0_suspend,
- .resume = mcp_sa11x0_resume,
.driver = {
- .name = "sa11x0-mcp",
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .pm = &mcp_sa11x0_pm_ops,
},
};
@@ -259,6 +313,7 @@ static struct platform_driver mcp_sa11x0_driver = {
*/
module_platform_driver(mcp_sa11x0_driver);
+MODULE_ALIAS("platform:" DRIVER_NAME);
MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
MODULE_DESCRIPTION("SA11x0 multimedia communications port driver");
MODULE_LICENSE("GPL");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.