diff options
Diffstat (limited to 'drivers/mfd/mcp-sa11x0.c')
-rw-r--r-- | drivers/mfd/mcp-sa11x0.c | 199 |
1 files changed, 127 insertions, 72 deletions
diff --git a/drivers/mfd/mcp-sa11x0.c b/drivers/mfd/mcp-sa11x0.c index 02c53a0766c..c54e244ca0c 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"); |