diff options
Diffstat (limited to 'arch/arm/mach-pxa')
| -rw-r--r-- | arch/arm/mach-pxa/Kconfig | 5 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/include/mach/ssp.h | 35 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/ssp.c | 286 |
3 files changed, 0 insertions, 326 deletions
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig index 089579f..8f7eb12 100644 --- a/arch/arm/mach-pxa/Kconfig +++ b/arch/arm/mach-pxa/Kconfig @@ -653,11 +653,6 @@ config PXA_SSP help Enable support for PXA2xx SSP ports -config PXA_SSP_LEGACY - bool - help - Support of legacy SSP API - 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/include/mach/ssp.h b/arch/arm/mach-pxa/include/mach/ssp.h index be1be5b..8470a73 100644 --- a/arch/arm/mach-pxa/include/mach/ssp.h +++ b/arch/arm/mach-pxa/include/mach/ssp.h @@ -46,41 +46,6 @@ struct ssp_device { int drcmr_tx; }; -#ifdef CONFIG_PXA_SSP_LEGACY -/* - * SSP initialisation flags - */ -#define SSP_NO_IRQ 0x1 /* don't register an irq handler in SSP driver */ - -struct ssp_state { - u32 cr0; - u32 cr1; - u32 to; - u32 psp; -}; - -struct ssp_dev { - struct ssp_device *ssp; - u32 port; - u32 mode; - u32 flags; - u32 psp_flags; - u32 speed; - int irq; -}; - -int ssp_write_word(struct ssp_dev *dev, u32 data); -int ssp_read_word(struct ssp_dev *dev, u32 *data); -int ssp_flush(struct ssp_dev *dev); -void ssp_enable(struct ssp_dev *dev); -void ssp_disable(struct ssp_dev *dev); -void ssp_save_state(struct ssp_dev *dev, struct ssp_state *ssp); -void ssp_restore_state(struct ssp_dev *dev, struct ssp_state *ssp); -int ssp_init(struct ssp_dev *dev, u32 port, u32 init_flags); -int ssp_config(struct ssp_dev *dev, u32 mode, u32 flags, u32 psp_flags, u32 speed); -void ssp_exit(struct ssp_dev *dev); -#endif /* CONFIG_PXA_SSP_LEGACY */ - /** * ssp_write_reg - Write to a SSP register * diff --git a/arch/arm/mach-pxa/ssp.c b/arch/arm/mach-pxa/ssp.c index a81d6db..6e7df7a 100644 --- a/arch/arm/mach-pxa/ssp.c +++ b/arch/arm/mach-pxa/ssp.c @@ -35,278 +35,6 @@ #include <mach/ssp.h> #include <mach/regs-ssp.h> -#ifdef CONFIG_PXA_SSP_LEGACY - -#define TIMEOUT 100000 - -static irqreturn_t ssp_interrupt(int irq, void *dev_id) -{ - struct ssp_dev *dev = dev_id; - struct ssp_device *ssp = dev->ssp; - unsigned int status; - - status = __raw_readl(ssp->mmio_base + SSSR); - __raw_writel(status, ssp->mmio_base + SSSR); - - if (status & SSSR_ROR) - printk(KERN_WARNING "SSP(%d): receiver overrun\n", dev->port); - - if (status & SSSR_TUR) - printk(KERN_WARNING "SSP(%d): transmitter underrun\n", dev->port); - - if (status & SSSR_BCE) - printk(KERN_WARNING "SSP(%d): bit count error\n", dev->port); - - return IRQ_HANDLED; -} - -/** - * ssp_write_word - write a word to the SSP port - * @data: 32-bit, MSB justified data to write. - * - * Wait for a free entry in the SSP transmit FIFO, and write a data - * word to the SSP port. - * - * The caller is expected to perform the necessary locking. - * - * Returns: - * %-ETIMEDOUT timeout occurred - * 0 success - */ -int ssp_write_word(struct ssp_dev *dev, u32 data) -{ - struct ssp_device *ssp = dev->ssp; - int timeout = TIMEOUT; - - while (!(__raw_readl(ssp->mmio_base + SSSR) & SSSR_TNF)) { - if (!--timeout) - return -ETIMEDOUT; - cpu_relax(); - } - - __raw_writel(data, ssp->mmio_base + SSDR); - - return 0; -} - -/** - * ssp_read_word - read a word from the SSP port - * - * Wait for a data word in the SSP receive FIFO, and return the - * received data. Data is LSB justified. - * - * Note: Currently, if data is not expected to be received, this - * function will wait for ever. - * - * The caller is expected to perform the necessary locking. - * - * Returns: - * %-ETIMEDOUT timeout occurred - * 32-bit data success - */ -int ssp_read_word(struct ssp_dev *dev, u32 *data) -{ - struct ssp_device *ssp = dev->ssp; - int timeout = TIMEOUT; - - while (!(__raw_readl(ssp->mmio_base + SSSR) & SSSR_RNE)) { - if (!--timeout) - return -ETIMEDOUT; - cpu_relax(); - } - - *data = __raw_readl(ssp->mmio_base + SSDR); - return 0; -} - -/** - * ssp_flush - flush the transmit and receive FIFOs - * - * Wait for the SSP to idle, and ensure that the receive FIFO - * is empty. - * - * The caller is expected to perform the necessary locking. - */ -int ssp_flush(struct ssp_dev *dev) -{ - struct ssp_device *ssp = dev->ssp; - int timeout = TIMEOUT * 2; - - /* ensure TX FIFO is empty instead of not full */ - if (cpu_is_pxa3xx()) { - while (__raw_readl(ssp->mmio_base + SSSR) & 0xf00) { - if (!--timeout) - return -ETIMEDOUT; - cpu_relax(); - } - timeout = TIMEOUT * 2; - } - - do { - while (__raw_readl(ssp->mmio_base + SSSR) & SSSR_RNE) { - if (!--timeout) - return -ETIMEDOUT; - (void)__raw_readl(ssp->mmio_base + SSDR); - } - if (!--timeout) - return -ETIMEDOUT; - } while (__raw_readl(ssp->mmio_base + SSSR) & SSSR_BSY); - - return 0; -} - -/** - * ssp_enable - enable the SSP port - * - * Turn on the SSP port. - */ -void ssp_enable(struct ssp_dev *dev) -{ - struct ssp_device *ssp = dev->ssp; - uint32_t sscr0; - - sscr0 = __raw_readl(ssp->mmio_base + SSCR0); - sscr0 |= SSCR0_SSE; - __raw_writel(sscr0, ssp->mmio_base + SSCR0); -} - -/** - * ssp_disable - shut down the SSP port - * - * Turn off the SSP port, optionally powering it down. - */ -void ssp_disable(struct ssp_dev *dev) -{ - struct ssp_device *ssp = dev->ssp; - uint32_t sscr0; - - sscr0 = __raw_readl(ssp->mmio_base + SSCR0); - sscr0 &= ~SSCR0_SSE; - __raw_writel(sscr0, ssp->mmio_base + SSCR0); -} - -/** - * ssp_save_state - save the SSP configuration - * @ssp: pointer to structure to save SSP configuration - * - * Save the configured SSP state for suspend. - */ -void ssp_save_state(struct ssp_dev *dev, struct ssp_state *state) -{ - struct ssp_device *ssp = dev->ssp; - - state->cr0 = __raw_readl(ssp->mmio_base + SSCR0); - state->cr1 = __raw_readl(ssp->mmio_base + SSCR1); - state->to = __raw_readl(ssp->mmio_base + SSTO); - state->psp = __raw_readl(ssp->mmio_base + SSPSP); - - ssp_disable(dev); -} - -/** - * ssp_restore_state - restore a previously saved SSP configuration - * @ssp: pointer to configuration saved by ssp_save_state - * - * Restore the SSP configuration saved previously by ssp_save_state. - */ -void ssp_restore_state(struct ssp_dev *dev, struct ssp_state *state) -{ - struct ssp_device *ssp = dev->ssp; - uint32_t sssr = SSSR_ROR | SSSR_TUR | SSSR_BCE; - - __raw_writel(sssr, ssp->mmio_base + SSSR); - - __raw_writel(state->cr0 & ~SSCR0_SSE, ssp->mmio_base + SSCR0); - __raw_writel(state->cr1, ssp->mmio_base + SSCR1); - __raw_writel(state->to, ssp->mmio_base + SSTO); - __raw_writel(state->psp, ssp->mmio_base + SSPSP); - __raw_writel(state->cr0, ssp->mmio_base + SSCR0); -} - -/** - * ssp_config - configure SSP port settings - * @mode: port operating mode - * @flags: port config flags - * @psp_flags: port PSP config flags - * @speed: port speed - * - * Port MUST be disabled by ssp_disable before making any config changes. - */ -int ssp_config(struct ssp_dev *dev, u32 mode, u32 flags, u32 psp_flags, u32 speed) -{ - struct ssp_device *ssp = dev->ssp; - - dev->mode = mode; - dev->flags = flags; - dev->psp_flags = psp_flags; - dev->speed = speed; - - /* set up port type, speed, port settings */ - __raw_writel((dev->speed | dev->mode), ssp->mmio_base + SSCR0); - __raw_writel(dev->flags, ssp->mmio_base + SSCR1); - __raw_writel(dev->psp_flags, ssp->mmio_base + SSPSP); - - return 0; -} - -/** - * ssp_init - setup the SSP port - * - * initialise and claim resources for the SSP port. - * - * Returns: - * %-ENODEV if the SSP port is unavailable - * %-EBUSY if the resources are already in use - * %0 on success - */ -int ssp_init(struct ssp_dev *dev, u32 port, u32 init_flags) -{ - struct ssp_device *ssp; - int ret; - - ssp = ssp_request(port, "SSP"); - if (ssp == NULL) - return -ENODEV; - - dev->ssp = ssp; - dev->port = port; - - /* do we need to get irq */ - if (!(init_flags & SSP_NO_IRQ)) { - ret = request_irq(ssp->irq, ssp_interrupt, - 0, "SSP", dev); - if (ret) - goto out_region; - dev->irq = ssp->irq; - } else - dev->irq = NO_IRQ; - - /* turn on SSP port clock */ - clk_enable(ssp->clk); - return 0; - -out_region: - ssp_free(ssp); - return ret; -} - -/** - * ssp_exit - undo the effects of ssp_init - * - * release and free resources for the SSP port. - */ -void ssp_exit(struct ssp_dev *dev) -{ - struct ssp_device *ssp = dev->ssp; - - ssp_disable(dev); - if (dev->irq != NO_IRQ) - free_irq(dev->irq, dev); - clk_disable(ssp->clk); - ssp_free(ssp); -} -#endif /* CONFIG_PXA_SSP_LEGACY */ - static DEFINE_MUTEX(ssp_lock); static LIST_HEAD(ssp_list); @@ -491,20 +219,6 @@ static void __exit pxa_ssp_exit(void) arch_initcall(pxa_ssp_init); module_exit(pxa_ssp_exit); -#ifdef CONFIG_PXA_SSP_LEGACY -EXPORT_SYMBOL(ssp_write_word); -EXPORT_SYMBOL(ssp_read_word); -EXPORT_SYMBOL(ssp_flush); -EXPORT_SYMBOL(ssp_enable); -EXPORT_SYMBOL(ssp_disable); -EXPORT_SYMBOL(ssp_save_state); -EXPORT_SYMBOL(ssp_restore_state); -EXPORT_SYMBOL(ssp_init); -EXPORT_SYMBOL(ssp_exit); -EXPORT_SYMBOL(ssp_config); -#endif - MODULE_DESCRIPTION("PXA SSP driver"); MODULE_AUTHOR("Liam Girdwood"); MODULE_LICENSE("GPL"); - |
