From 54c39b420f017c546fb130a05c14bdb0a7910f98 Mon Sep 17 00:00:00 2001 From: Haojian Zhuang Date: Tue, 16 Mar 2010 17:12:37 +0800 Subject: [ARM] pxa: move ssp into common plat-pxa Signed-off-by: Haojian Zhuang Acked-by: Mark Brown Signed-off-by: Eric Miao --- arch/arm/mach-pxa/Kconfig | 5 - arch/arm/mach-pxa/Makefile | 1 - arch/arm/mach-pxa/include/mach/ssp.h | 196 ------------------------------ arch/arm/mach-pxa/poodle.c | 2 +- arch/arm/mach-pxa/ssp.c | 223 ----------------------------------- arch/arm/plat-pxa/Kconfig | 5 + arch/arm/plat-pxa/Makefile | 1 + arch/arm/plat-pxa/include/plat/ssp.h | 196 ++++++++++++++++++++++++++++++ arch/arm/plat-pxa/ssp.c | 223 +++++++++++++++++++++++++++++++++++ 9 files changed, 426 insertions(+), 426 deletions(-) delete mode 100644 arch/arm/mach-pxa/include/mach/ssp.h delete mode 100644 arch/arm/mach-pxa/ssp.c create mode 100644 arch/arm/plat-pxa/include/plat/ssp.h create mode 100644 arch/arm/plat-pxa/ssp.c (limited to 'arch') diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig index 8f7eb12..6dd450a 100644 --- a/arch/arm/mach-pxa/Kconfig +++ b/arch/arm/mach-pxa/Kconfig @@ -648,11 +648,6 @@ config PXA_SHARP_Cxx00 help Enable common support for Sharp Cxx00 models -config PXA_SSP - tristate - help - Enable support for PXA2xx SSP ports - config TOSA_BT tristate "Control the state of built-in bluetooth chip on Sharp SL-6000" depends on MACH_TOSA diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile index a83aff3..cf57fb2 100644 --- a/arch/arm/mach-pxa/Makefile +++ b/arch/arm/mach-pxa/Makefile @@ -14,7 +14,6 @@ obj-$(CONFIG_PXA3xx) += cpufreq-pxa3xx.o endif # Generic drivers that other drivers may depend upon -obj-$(CONFIG_PXA_SSP) += ssp.o # SoC-specific code obj-$(CONFIG_PXA25x) += mfp-pxa2xx.o pxa2xx.o pxa25x.o diff --git a/arch/arm/mach-pxa/include/mach/ssp.h b/arch/arm/mach-pxa/include/mach/ssp.h deleted file mode 100644 index 4c4ce62..0000000 --- a/arch/arm/mach-pxa/include/mach/ssp.h +++ /dev/null @@ -1,196 +0,0 @@ -/* - * ssp.h - * - * Copyright (C) 2003 Russell King, All Rights Reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This driver supports the following PXA CPU/SSP ports:- - * - * PXA250 SSP - * PXA255 SSP, NSSP - * PXA26x SSP, NSSP, ASSP - * PXA27x SSP1, SSP2, SSP3 - * PXA3xx SSP1, SSP2, SSP3, SSP4 - */ - -#ifndef __ASM_ARCH_SSP_H -#define __ASM_ARCH_SSP_H - -#include -#include - -/* - * SSP Serial Port Registers - * PXA250, PXA255, PXA26x and PXA27x SSP controllers are all slightly different. - * PXA255, PXA26x and PXA27x have extra ports, registers and bits. - */ - -#define SSCR0 (0x00) /* SSP Control Register 0 */ -#define SSCR1 (0x04) /* SSP Control Register 1 */ -#define SSSR (0x08) /* SSP Status Register */ -#define SSITR (0x0C) /* SSP Interrupt Test Register */ -#define SSDR (0x10) /* SSP Data Write/Data Read Register */ - -#define SSTO (0x28) /* SSP Time Out Register */ -#define SSPSP (0x2C) /* SSP Programmable Serial Protocol */ -#define SSTSA (0x30) /* SSP Tx Timeslot Active */ -#define SSRSA (0x34) /* SSP Rx Timeslot Active */ -#define SSTSS (0x38) /* SSP Timeslot Status */ -#define SSACD (0x3C) /* SSP Audio Clock Divider */ - -#if defined(CONFIG_PXA3xx) -#define SSACDD (0x40) /* SSP Audio Clock Dither Divider */ -#endif - -/* Common PXA2xx bits first */ -#define SSCR0_DSS (0x0000000f) /* Data Size Select (mask) */ -#define SSCR0_DataSize(x) ((x) - 1) /* Data Size Select [4..16] */ -#define SSCR0_FRF (0x00000030) /* FRame Format (mask) */ -#define SSCR0_Motorola (0x0 << 4) /* Motorola's Serial Peripheral Interface (SPI) */ -#define SSCR0_TI (0x1 << 4) /* Texas Instruments' Synchronous Serial Protocol (SSP) */ -#define SSCR0_National (0x2 << 4) /* National Microwire */ -#define SSCR0_ECS (1 << 6) /* External clock select */ -#define SSCR0_SSE (1 << 7) /* Synchronous Serial Port Enable */ -#define SSCR0_SCR(x) ((x) << 8) /* Serial Clock Rate (mask) */ - -#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx) -#define SSCR0_EDSS (1 << 20) /* Extended data size select */ -#define SSCR0_NCS (1 << 21) /* Network clock select */ -#define SSCR0_RIM (1 << 22) /* Receive FIFO overrrun interrupt mask */ -#define SSCR0_TUM (1 << 23) /* Transmit FIFO underrun interrupt mask */ -#define SSCR0_FRDC (0x07000000) /* Frame rate divider control (mask) */ -#define SSCR0_SlotsPerFrm(x) (((x) - 1) << 24) /* Time slots per frame [1..8] */ -#define SSCR0_ACS (1 << 30) /* Audio clock select */ -#define SSCR0_MOD (1 << 31) /* Mode (normal or network) */ -#endif - -#if defined(CONFIG_PXA3xx) -#define SSCR0_FPCKE (1 << 29) /* FIFO packing enable */ -#endif - -#define SSCR1_RIE (1 << 0) /* Receive FIFO Interrupt Enable */ -#define SSCR1_TIE (1 << 1) /* Transmit FIFO Interrupt Enable */ -#define SSCR1_LBM (1 << 2) /* Loop-Back Mode */ -#define SSCR1_SPO (1 << 3) /* Motorola SPI SSPSCLK polarity setting */ -#define SSCR1_SPH (1 << 4) /* Motorola SPI SSPSCLK phase setting */ -#define SSCR1_MWDS (1 << 5) /* Microwire Transmit Data Size */ -#define SSCR1_TFT (0x000003c0) /* Transmit FIFO Threshold (mask) */ -#define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..16] */ -#define SSCR1_RFT (0x00003c00) /* Receive FIFO Threshold (mask) */ -#define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..16] */ - -#define SSSR_TNF (1 << 2) /* Transmit FIFO Not Full */ -#define SSSR_RNE (1 << 3) /* Receive FIFO Not Empty */ -#define SSSR_BSY (1 << 4) /* SSP Busy */ -#define SSSR_TFS (1 << 5) /* Transmit FIFO Service Request */ -#define SSSR_RFS (1 << 6) /* Receive FIFO Service Request */ -#define SSSR_ROR (1 << 7) /* Receive FIFO Overrun */ - -#define SSCR0_TIM (1 << 23) /* Transmit FIFO Under Run Interrupt Mask */ -#define SSCR0_RIM (1 << 22) /* Receive FIFO Over Run interrupt Mask */ -#define SSCR0_NCS (1 << 21) /* Network Clock Select */ -#define SSCR0_EDSS (1 << 20) /* Extended Data Size Select */ - -/* extra bits in PXA255, PXA26x and PXA27x SSP ports */ -#define SSCR0_TISSP (1 << 4) /* TI Sync Serial Protocol */ -#define SSCR0_PSP (3 << 4) /* PSP - Programmable Serial Protocol */ -#define SSCR1_TTELP (1 << 31) /* TXD Tristate Enable Last Phase */ -#define SSCR1_TTE (1 << 30) /* TXD Tristate Enable */ -#define SSCR1_EBCEI (1 << 29) /* Enable Bit Count Error interrupt */ -#define SSCR1_SCFR (1 << 28) /* Slave Clock free Running */ -#define SSCR1_ECRA (1 << 27) /* Enable Clock Request A */ -#define SSCR1_ECRB (1 << 26) /* Enable Clock request B */ -#define SSCR1_SCLKDIR (1 << 25) /* Serial Bit Rate Clock Direction */ -#define SSCR1_SFRMDIR (1 << 24) /* Frame Direction */ -#define SSCR1_RWOT (1 << 23) /* Receive Without Transmit */ -#define SSCR1_TRAIL (1 << 22) /* Trailing Byte */ -#define SSCR1_TSRE (1 << 21) /* Transmit Service Request Enable */ -#define SSCR1_RSRE (1 << 20) /* Receive Service Request Enable */ -#define SSCR1_TINTE (1 << 19) /* Receiver Time-out Interrupt enable */ -#define SSCR1_PINTE (1 << 18) /* Peripheral Trailing Byte Interupt Enable */ -#define SSCR1_IFS (1 << 16) /* Invert Frame Signal */ -#define SSCR1_STRF (1 << 15) /* Select FIFO or EFWR */ -#define SSCR1_EFWR (1 << 14) /* Enable FIFO Write/Read */ - -#define SSSR_BCE (1 << 23) /* Bit Count Error */ -#define SSSR_CSS (1 << 22) /* Clock Synchronisation Status */ -#define SSSR_TUR (1 << 21) /* Transmit FIFO Under Run */ -#define SSSR_EOC (1 << 20) /* End Of Chain */ -#define SSSR_TINT (1 << 19) /* Receiver Time-out Interrupt */ -#define SSSR_PINT (1 << 18) /* Peripheral Trailing Byte Interrupt */ - -#if defined(CONFIG_PXA3xx) -#define SSPSP_EDMYSTOP(x) ((x) << 28) /* Extended Dummy Stop */ -#define SSPSP_EDMYSTRT(x) ((x) << 26) /* Extended Dummy Start */ -#endif - -#define SSPSP_FSRT (1 << 25) /* Frame Sync Relative Timing */ -#define SSPSP_DMYSTOP(x) ((x) << 23) /* Dummy Stop */ -#define SSPSP_SFRMWDTH(x) ((x) << 16) /* Serial Frame Width */ -#define SSPSP_SFRMDLY(x) ((x) << 9) /* Serial Frame Delay */ -#define SSPSP_DMYSTRT(x) ((x) << 7) /* Dummy Start */ -#define SSPSP_STRTDLY(x) ((x) << 4) /* Start Delay */ -#define SSPSP_ETDS (1 << 3) /* End of Transfer data State */ -#define SSPSP_SFRMP (1 << 2) /* Serial Frame Polarity */ -#define SSPSP_SCMODE(x) ((x) << 0) /* Serial Bit Rate Clock Mode */ - -#define SSACD_SCDB (1 << 3) /* SSPSYSCLK Divider Bypass */ -#define SSACD_ACPS(x) ((x) << 4) /* Audio clock PLL select */ -#define SSACD_ACDS(x) ((x) << 0) /* Audio clock divider select */ -#if defined(CONFIG_PXA3xx) -#define SSACD_SCDX8 (1 << 7) /* SYSCLK division ratio select */ -#endif - -enum pxa_ssp_type { - SSP_UNDEFINED = 0, - PXA25x_SSP, /* pxa 210, 250, 255, 26x */ - PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */ - PXA27x_SSP, -}; - -struct ssp_device { - struct platform_device *pdev; - struct list_head node; - - struct clk *clk; - void __iomem *mmio_base; - unsigned long phys_base; - - const char *label; - int port_id; - int type; - int use_count; - int irq; - int drcmr_rx; - int drcmr_tx; -}; - -/** - * ssp_write_reg - Write to a SSP register - * - * @dev: SSP device to access - * @reg: Register to write to - * @val: Value to be written. - */ -static inline void ssp_write_reg(struct ssp_device *dev, u32 reg, u32 val) -{ - __raw_writel(val, dev->mmio_base + reg); -} - -/** - * ssp_read_reg - Read from a SSP register - * - * @dev: SSP device to access - * @reg: Register to read from - */ -static inline u32 ssp_read_reg(struct ssp_device *dev, u32 reg) -{ - return __raw_readl(dev->mmio_base + reg); -} - -struct ssp_device *ssp_request(int port, const char *label); -void ssp_free(struct ssp_device *); -#endif /* __ASM_ARCH_SSP_H */ diff --git a/arch/arm/mach-pxa/poodle.c b/arch/arm/mach-pxa/poodle.c index 48b10c7..dcb1788 100644 --- a/arch/arm/mach-pxa/poodle.c +++ b/arch/arm/mach-pxa/poodle.c @@ -40,12 +40,12 @@ #include #include #include -#include #include #include #include #include #include +#include #include #include diff --git a/arch/arm/mach-pxa/ssp.c b/arch/arm/mach-pxa/ssp.c deleted file mode 100644 index a9b2d3e..0000000 --- a/arch/arm/mach-pxa/ssp.c +++ /dev/null @@ -1,223 +0,0 @@ -/* - * linux/arch/arm/mach-pxa/ssp.c - * - * based on linux/arch/arm/mach-sa1100/ssp.c by Russell King - * - * Copyright (C) 2003 Russell King. - * Copyright (C) 2003 Wolfson Microelectronics PLC - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * PXA2xx SSP driver. This provides the generic core for simple - * IO-based SSP applications and allows easy port setup for DMA access. - * - * Author: Liam Girdwood - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -static DEFINE_MUTEX(ssp_lock); -static LIST_HEAD(ssp_list); - -struct ssp_device *ssp_request(int port, const char *label) -{ - struct ssp_device *ssp = NULL; - - mutex_lock(&ssp_lock); - - list_for_each_entry(ssp, &ssp_list, node) { - if (ssp->port_id == port && ssp->use_count == 0) { - ssp->use_count++; - ssp->label = label; - break; - } - } - - mutex_unlock(&ssp_lock); - - if (&ssp->node == &ssp_list) - return NULL; - - return ssp; -} -EXPORT_SYMBOL(ssp_request); - -void ssp_free(struct ssp_device *ssp) -{ - mutex_lock(&ssp_lock); - if (ssp->use_count) { - ssp->use_count--; - ssp->label = NULL; - } else - dev_err(&ssp->pdev->dev, "device already free\n"); - mutex_unlock(&ssp_lock); -} -EXPORT_SYMBOL(ssp_free); - -static int __devinit ssp_probe(struct platform_device *pdev) -{ - const struct platform_device_id *id = platform_get_device_id(pdev); - struct resource *res; - struct ssp_device *ssp; - int ret = 0; - - ssp = kzalloc(sizeof(struct ssp_device), GFP_KERNEL); - if (ssp == NULL) { - dev_err(&pdev->dev, "failed to allocate memory"); - return -ENOMEM; - } - ssp->pdev = pdev; - - ssp->clk = clk_get(&pdev->dev, NULL); - if (IS_ERR(ssp->clk)) { - ret = PTR_ERR(ssp->clk); - goto err_free; - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) { - dev_err(&pdev->dev, "no memory resource defined\n"); - ret = -ENODEV; - goto err_free_clk; - } - - res = request_mem_region(res->start, res->end - res->start + 1, - pdev->name); - if (res == NULL) { - dev_err(&pdev->dev, "failed to request memory resource\n"); - ret = -EBUSY; - goto err_free_clk; - } - - ssp->phys_base = res->start; - - ssp->mmio_base = ioremap(res->start, res->end - res->start + 1); - if (ssp->mmio_base == NULL) { - dev_err(&pdev->dev, "failed to ioremap() registers\n"); - ret = -ENODEV; - goto err_free_mem; - } - - ssp->irq = platform_get_irq(pdev, 0); - if (ssp->irq < 0) { - dev_err(&pdev->dev, "no IRQ resource defined\n"); - ret = -ENODEV; - goto err_free_io; - } - - res = platform_get_resource(pdev, IORESOURCE_DMA, 0); - if (res == NULL) { - dev_err(&pdev->dev, "no SSP RX DRCMR defined\n"); - ret = -ENODEV; - goto err_free_io; - } - ssp->drcmr_rx = res->start; - - res = platform_get_resource(pdev, IORESOURCE_DMA, 1); - if (res == NULL) { - dev_err(&pdev->dev, "no SSP TX DRCMR defined\n"); - ret = -ENODEV; - goto err_free_io; - } - ssp->drcmr_tx = res->start; - - /* PXA2xx/3xx SSP ports starts from 1 and the internal pdev->id - * starts from 0, do a translation here - */ - ssp->port_id = pdev->id + 1; - ssp->use_count = 0; - ssp->type = (int)id->driver_data; - - mutex_lock(&ssp_lock); - list_add(&ssp->node, &ssp_list); - mutex_unlock(&ssp_lock); - - platform_set_drvdata(pdev, ssp); - return 0; - -err_free_io: - iounmap(ssp->mmio_base); -err_free_mem: - release_mem_region(res->start, res->end - res->start + 1); -err_free_clk: - clk_put(ssp->clk); -err_free: - kfree(ssp); - return ret; -} - -static int __devexit ssp_remove(struct platform_device *pdev) -{ - struct resource *res; - struct ssp_device *ssp; - - ssp = platform_get_drvdata(pdev); - if (ssp == NULL) - return -ENODEV; - - iounmap(ssp->mmio_base); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(res->start, res->end - res->start + 1); - - clk_put(ssp->clk); - - mutex_lock(&ssp_lock); - list_del(&ssp->node); - mutex_unlock(&ssp_lock); - - kfree(ssp); - return 0; -} - -static const struct platform_device_id ssp_id_table[] = { - { "pxa25x-ssp", PXA25x_SSP }, - { "pxa25x-nssp", PXA25x_NSSP }, - { "pxa27x-ssp", PXA27x_SSP }, - { }, -}; - -static struct platform_driver ssp_driver = { - .probe = ssp_probe, - .remove = __devexit_p(ssp_remove), - .driver = { - .owner = THIS_MODULE, - .name = "pxa2xx-ssp", - }, - .id_table = ssp_id_table, -}; - -static int __init pxa_ssp_init(void) -{ - return platform_driver_register(&ssp_driver); -} - -static void __exit pxa_ssp_exit(void) -{ - platform_driver_unregister(&ssp_driver); -} - -arch_initcall(pxa_ssp_init); -module_exit(pxa_ssp_exit); - -MODULE_DESCRIPTION("PXA SSP driver"); -MODULE_AUTHOR("Liam Girdwood"); -MODULE_LICENSE("GPL"); diff --git a/arch/arm/plat-pxa/Kconfig b/arch/arm/plat-pxa/Kconfig index b158e98..da53395 100644 --- a/arch/arm/plat-pxa/Kconfig +++ b/arch/arm/plat-pxa/Kconfig @@ -1,3 +1,8 @@ if PLAT_PXA +config PXA_SSP + tristate + help + Enable support for PXA2xx SSP ports + endif diff --git a/arch/arm/plat-pxa/Makefile b/arch/arm/plat-pxa/Makefile index 0264bfb..4aacdd1 100644 --- a/arch/arm/plat-pxa/Makefile +++ b/arch/arm/plat-pxa/Makefile @@ -9,3 +9,4 @@ obj-$(CONFIG_PXA3xx) += mfp.o obj-$(CONFIG_ARCH_MMP) += mfp.o obj-$(CONFIG_HAVE_PWM) += pwm.o +obj-$(CONFIG_PXA_SSP) += ssp.o diff --git a/arch/arm/plat-pxa/include/plat/ssp.h b/arch/arm/plat-pxa/include/plat/ssp.h new file mode 100644 index 0000000..4c4ce62 --- /dev/null +++ b/arch/arm/plat-pxa/include/plat/ssp.h @@ -0,0 +1,196 @@ +/* + * ssp.h + * + * Copyright (C) 2003 Russell King, All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This driver supports the following PXA CPU/SSP ports:- + * + * PXA250 SSP + * PXA255 SSP, NSSP + * PXA26x SSP, NSSP, ASSP + * PXA27x SSP1, SSP2, SSP3 + * PXA3xx SSP1, SSP2, SSP3, SSP4 + */ + +#ifndef __ASM_ARCH_SSP_H +#define __ASM_ARCH_SSP_H + +#include +#include + +/* + * SSP Serial Port Registers + * PXA250, PXA255, PXA26x and PXA27x SSP controllers are all slightly different. + * PXA255, PXA26x and PXA27x have extra ports, registers and bits. + */ + +#define SSCR0 (0x00) /* SSP Control Register 0 */ +#define SSCR1 (0x04) /* SSP Control Register 1 */ +#define SSSR (0x08) /* SSP Status Register */ +#define SSITR (0x0C) /* SSP Interrupt Test Register */ +#define SSDR (0x10) /* SSP Data Write/Data Read Register */ + +#define SSTO (0x28) /* SSP Time Out Register */ +#define SSPSP (0x2C) /* SSP Programmable Serial Protocol */ +#define SSTSA (0x30) /* SSP Tx Timeslot Active */ +#define SSRSA (0x34) /* SSP Rx Timeslot Active */ +#define SSTSS (0x38) /* SSP Timeslot Status */ +#define SSACD (0x3C) /* SSP Audio Clock Divider */ + +#if defined(CONFIG_PXA3xx) +#define SSACDD (0x40) /* SSP Audio Clock Dither Divider */ +#endif + +/* Common PXA2xx bits first */ +#define SSCR0_DSS (0x0000000f) /* Data Size Select (mask) */ +#define SSCR0_DataSize(x) ((x) - 1) /* Data Size Select [4..16] */ +#define SSCR0_FRF (0x00000030) /* FRame Format (mask) */ +#define SSCR0_Motorola (0x0 << 4) /* Motorola's Serial Peripheral Interface (SPI) */ +#define SSCR0_TI (0x1 << 4) /* Texas Instruments' Synchronous Serial Protocol (SSP) */ +#define SSCR0_National (0x2 << 4) /* National Microwire */ +#define SSCR0_ECS (1 << 6) /* External clock select */ +#define SSCR0_SSE (1 << 7) /* Synchronous Serial Port Enable */ +#define SSCR0_SCR(x) ((x) << 8) /* Serial Clock Rate (mask) */ + +#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx) +#define SSCR0_EDSS (1 << 20) /* Extended data size select */ +#define SSCR0_NCS (1 << 21) /* Network clock select */ +#define SSCR0_RIM (1 << 22) /* Receive FIFO overrrun interrupt mask */ +#define SSCR0_TUM (1 << 23) /* Transmit FIFO underrun interrupt mask */ +#define SSCR0_FRDC (0x07000000) /* Frame rate divider control (mask) */ +#define SSCR0_SlotsPerFrm(x) (((x) - 1) << 24) /* Time slots per frame [1..8] */ +#define SSCR0_ACS (1 << 30) /* Audio clock select */ +#define SSCR0_MOD (1 << 31) /* Mode (normal or network) */ +#endif + +#if defined(CONFIG_PXA3xx) +#define SSCR0_FPCKE (1 << 29) /* FIFO packing enable */ +#endif + +#define SSCR1_RIE (1 << 0) /* Receive FIFO Interrupt Enable */ +#define SSCR1_TIE (1 << 1) /* Transmit FIFO Interrupt Enable */ +#define SSCR1_LBM (1 << 2) /* Loop-Back Mode */ +#define SSCR1_SPO (1 << 3) /* Motorola SPI SSPSCLK polarity setting */ +#define SSCR1_SPH (1 << 4) /* Motorola SPI SSPSCLK phase setting */ +#define SSCR1_MWDS (1 << 5) /* Microwire Transmit Data Size */ +#define SSCR1_TFT (0x000003c0) /* Transmit FIFO Threshold (mask) */ +#define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..16] */ +#define SSCR1_RFT (0x00003c00) /* Receive FIFO Threshold (mask) */ +#define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..16] */ + +#define SSSR_TNF (1 << 2) /* Transmit FIFO Not Full */ +#define SSSR_RNE (1 << 3) /* Receive FIFO Not Empty */ +#define SSSR_BSY (1 << 4) /* SSP Busy */ +#define SSSR_TFS (1 << 5) /* Transmit FIFO Service Request */ +#define SSSR_RFS (1 << 6) /* Receive FIFO Service Request */ +#define SSSR_ROR (1 << 7) /* Receive FIFO Overrun */ + +#define SSCR0_TIM (1 << 23) /* Transmit FIFO Under Run Interrupt Mask */ +#define SSCR0_RIM (1 << 22) /* Receive FIFO Over Run interrupt Mask */ +#define SSCR0_NCS (1 << 21) /* Network Clock Select */ +#define SSCR0_EDSS (1 << 20) /* Extended Data Size Select */ + +/* extra bits in PXA255, PXA26x and PXA27x SSP ports */ +#define SSCR0_TISSP (1 << 4) /* TI Sync Serial Protocol */ +#define SSCR0_PSP (3 << 4) /* PSP - Programmable Serial Protocol */ +#define SSCR1_TTELP (1 << 31) /* TXD Tristate Enable Last Phase */ +#define SSCR1_TTE (1 << 30) /* TXD Tristate Enable */ +#define SSCR1_EBCEI (1 << 29) /* Enable Bit Count Error interrupt */ +#define SSCR1_SCFR (1 << 28) /* Slave Clock free Running */ +#define SSCR1_ECRA (1 << 27) /* Enable Clock Request A */ +#define SSCR1_ECRB (1 << 26) /* Enable Clock request B */ +#define SSCR1_SCLKDIR (1 << 25) /* Serial Bit Rate Clock Direction */ +#define SSCR1_SFRMDIR (1 << 24) /* Frame Direction */ +#define SSCR1_RWOT (1 << 23) /* Receive Without Transmit */ +#define SSCR1_TRAIL (1 << 22) /* Trailing Byte */ +#define SSCR1_TSRE (1 << 21) /* Transmit Service Request Enable */ +#define SSCR1_RSRE (1 << 20) /* Receive Service Request Enable */ +#define SSCR1_TINTE (1 << 19) /* Receiver Time-out Interrupt enable */ +#define SSCR1_PINTE (1 << 18) /* Peripheral Trailing Byte Interupt Enable */ +#define SSCR1_IFS (1 << 16) /* Invert Frame Signal */ +#define SSCR1_STRF (1 << 15) /* Select FIFO or EFWR */ +#define SSCR1_EFWR (1 << 14) /* Enable FIFO Write/Read */ + +#define SSSR_BCE (1 << 23) /* Bit Count Error */ +#define SSSR_CSS (1 << 22) /* Clock Synchronisation Status */ +#define SSSR_TUR (1 << 21) /* Transmit FIFO Under Run */ +#define SSSR_EOC (1 << 20) /* End Of Chain */ +#define SSSR_TINT (1 << 19) /* Receiver Time-out Interrupt */ +#define SSSR_PINT (1 << 18) /* Peripheral Trailing Byte Interrupt */ + +#if defined(CONFIG_PXA3xx) +#define SSPSP_EDMYSTOP(x) ((x) << 28) /* Extended Dummy Stop */ +#define SSPSP_EDMYSTRT(x) ((x) << 26) /* Extended Dummy Start */ +#endif + +#define SSPSP_FSRT (1 << 25) /* Frame Sync Relative Timing */ +#define SSPSP_DMYSTOP(x) ((x) << 23) /* Dummy Stop */ +#define SSPSP_SFRMWDTH(x) ((x) << 16) /* Serial Frame Width */ +#define SSPSP_SFRMDLY(x) ((x) << 9) /* Serial Frame Delay */ +#define SSPSP_DMYSTRT(x) ((x) << 7) /* Dummy Start */ +#define SSPSP_STRTDLY(x) ((x) << 4) /* Start Delay */ +#define SSPSP_ETDS (1 << 3) /* End of Transfer data State */ +#define SSPSP_SFRMP (1 << 2) /* Serial Frame Polarity */ +#define SSPSP_SCMODE(x) ((x) << 0) /* Serial Bit Rate Clock Mode */ + +#define SSACD_SCDB (1 << 3) /* SSPSYSCLK Divider Bypass */ +#define SSACD_ACPS(x) ((x) << 4) /* Audio clock PLL select */ +#define SSACD_ACDS(x) ((x) << 0) /* Audio clock divider select */ +#if defined(CONFIG_PXA3xx) +#define SSACD_SCDX8 (1 << 7) /* SYSCLK division ratio select */ +#endif + +enum pxa_ssp_type { + SSP_UNDEFINED = 0, + PXA25x_SSP, /* pxa 210, 250, 255, 26x */ + PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */ + PXA27x_SSP, +}; + +struct ssp_device { + struct platform_device *pdev; + struct list_head node; + + struct clk *clk; + void __iomem *mmio_base; + unsigned long phys_base; + + const char *label; + int port_id; + int type; + int use_count; + int irq; + int drcmr_rx; + int drcmr_tx; +}; + +/** + * ssp_write_reg - Write to a SSP register + * + * @dev: SSP device to access + * @reg: Register to write to + * @val: Value to be written. + */ +static inline void ssp_write_reg(struct ssp_device *dev, u32 reg, u32 val) +{ + __raw_writel(val, dev->mmio_base + reg); +} + +/** + * ssp_read_reg - Read from a SSP register + * + * @dev: SSP device to access + * @reg: Register to read from + */ +static inline u32 ssp_read_reg(struct ssp_device *dev, u32 reg) +{ + return __raw_readl(dev->mmio_base + reg); +} + +struct ssp_device *ssp_request(int port, const char *label); +void ssp_free(struct ssp_device *); +#endif /* __ASM_ARCH_SSP_H */ diff --git a/arch/arm/plat-pxa/ssp.c b/arch/arm/plat-pxa/ssp.c new file mode 100644 index 0000000..5fe2301 --- /dev/null +++ b/arch/arm/plat-pxa/ssp.c @@ -0,0 +1,223 @@ +/* + * linux/arch/arm/mach-pxa/ssp.c + * + * based on linux/arch/arm/mach-sa1100/ssp.c by Russell King + * + * Copyright (C) 2003 Russell King. + * Copyright (C) 2003 Wolfson Microelectronics PLC + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * PXA2xx SSP driver. This provides the generic core for simple + * IO-based SSP applications and allows easy port setup for DMA access. + * + * Author: Liam Girdwood + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +static DEFINE_MUTEX(ssp_lock); +static LIST_HEAD(ssp_list); + +struct ssp_device *ssp_request(int port, const char *label) +{ + struct ssp_device *ssp = NULL; + + mutex_lock(&ssp_lock); + + list_for_each_entry(ssp, &ssp_list, node) { + if (ssp->port_id == port && ssp->use_count == 0) { + ssp->use_count++; + ssp->label = label; + break; + } + } + + mutex_unlock(&ssp_lock); + + if (&ssp->node == &ssp_list) + return NULL; + + return ssp; +} +EXPORT_SYMBOL(ssp_request); + +void ssp_free(struct ssp_device *ssp) +{ + mutex_lock(&ssp_lock); + if (ssp->use_count) { + ssp->use_count--; + ssp->label = NULL; + } else + dev_err(&ssp->pdev->dev, "device already free\n"); + mutex_unlock(&ssp_lock); +} +EXPORT_SYMBOL(ssp_free); + +static int __devinit ssp_probe(struct platform_device *pdev) +{ + const struct platform_device_id *id = platform_get_device_id(pdev); + struct resource *res; + struct ssp_device *ssp; + int ret = 0; + + ssp = kzalloc(sizeof(struct ssp_device), GFP_KERNEL); + if (ssp == NULL) { + dev_err(&pdev->dev, "failed to allocate memory"); + return -ENOMEM; + } + ssp->pdev = pdev; + + ssp->clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(ssp->clk)) { + ret = PTR_ERR(ssp->clk); + goto err_free; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (res == NULL) { + dev_err(&pdev->dev, "no memory resource defined\n"); + ret = -ENODEV; + goto err_free_clk; + } + + res = request_mem_region(res->start, res->end - res->start + 1, + pdev->name); + if (res == NULL) { + dev_err(&pdev->dev, "failed to request memory resource\n"); + ret = -EBUSY; + goto err_free_clk; + } + + ssp->phys_base = res->start; + + ssp->mmio_base = ioremap(res->start, res->end - res->start + 1); + if (ssp->mmio_base == NULL) { + dev_err(&pdev->dev, "failed to ioremap() registers\n"); + ret = -ENODEV; + goto err_free_mem; + } + + ssp->irq = platform_get_irq(pdev, 0); + if (ssp->irq < 0) { + dev_err(&pdev->dev, "no IRQ resource defined\n"); + ret = -ENODEV; + goto err_free_io; + } + + res = platform_get_resource(pdev, IORESOURCE_DMA, 0); + if (res == NULL) { + dev_err(&pdev->dev, "no SSP RX DRCMR defined\n"); + ret = -ENODEV; + goto err_free_io; + } + ssp->drcmr_rx = res->start; + + res = platform_get_resource(pdev, IORESOURCE_DMA, 1); + if (res == NULL) { + dev_err(&pdev->dev, "no SSP TX DRCMR defined\n"); + ret = -ENODEV; + goto err_free_io; + } + ssp->drcmr_tx = res->start; + + /* PXA2xx/3xx SSP ports starts from 1 and the internal pdev->id + * starts from 0, do a translation here + */ + ssp->port_id = pdev->id + 1; + ssp->use_count = 0; + ssp->type = (int)id->driver_data; + + mutex_lock(&ssp_lock); + list_add(&ssp->node, &ssp_list); + mutex_unlock(&ssp_lock); + + platform_set_drvdata(pdev, ssp); + return 0; + +err_free_io: + iounmap(ssp->mmio_base); +err_free_mem: + release_mem_region(res->start, res->end - res->start + 1); +err_free_clk: + clk_put(ssp->clk); +err_free: + kfree(ssp); + return ret; +} + +static int __devexit ssp_remove(struct platform_device *pdev) +{ + struct resource *res; + struct ssp_device *ssp; + + ssp = platform_get_drvdata(pdev); + if (ssp == NULL) + return -ENODEV; + + iounmap(ssp->mmio_base); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + release_mem_region(res->start, res->end - res->start + 1); + + clk_put(ssp->clk); + + mutex_lock(&ssp_lock); + list_del(&ssp->node); + mutex_unlock(&ssp_lock); + + kfree(ssp); + return 0; +} + +static const struct platform_device_id ssp_id_table[] = { + { "pxa25x-ssp", PXA25x_SSP }, + { "pxa25x-nssp", PXA25x_NSSP }, + { "pxa27x-ssp", PXA27x_SSP }, + { }, +}; + +static struct platform_driver ssp_driver = { + .probe = ssp_probe, + .remove = __devexit_p(ssp_remove), + .driver = { + .owner = THIS_MODULE, + .name = "pxa2xx-ssp", + }, + .id_table = ssp_id_table, +}; + +static int __init pxa_ssp_init(void) +{ + return platform_driver_register(&ssp_driver); +} + +static void __exit pxa_ssp_exit(void) +{ + platform_driver_unregister(&ssp_driver); +} + +arch_initcall(pxa_ssp_init); +module_exit(pxa_ssp_exit); + +MODULE_DESCRIPTION("PXA SSP driver"); +MODULE_AUTHOR("Liam Girdwood"); +MODULE_LICENSE("GPL"); -- cgit v1.1