The patch adds support for emulated UART controllers on the programmable realtime unit (PRU) available on OMAPL138. This defines the system resource requirements such as pin mux, clock, iomem, interrupt etc and registers the platform device as per the Linux driver model.
Signed-off-by: Subhasish Ghosh <[email protected]> --- arch/arm/mach-davinci/da850.c | 16 +++++ arch/arm/mach-davinci/devices-da8xx.c | 95 ++++++++++++++++++++++++++- arch/arm/mach-davinci/include/mach/da8xx.h | 1 + arch/arm/mach-davinci/include/mach/memory.h | 1 + include/linux/serial_core.h | 3 + 5 files changed, 115 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c index 63916b9..85508c2 100644 --- a/arch/arm/mach-davinci/da850.c +++ b/arch/arm/mach-davinci/da850.c @@ -238,6 +238,12 @@ static struct clk tptc2_clk = { .flags = ALWAYS_ENABLED, }; +static struct clk pru_clk = { + .name = "pruss", + .parent = &pll0_sysclk2, + .lpsc = DA8XX_LPSC0_DMAX, +}; + static struct clk uart0_clk = { .name = "uart0", .parent = &pll0_sysclk2, @@ -318,6 +324,14 @@ static struct clk mcasp_clk = { .flags = DA850_CLK_ASYNC3, }; +static struct clk mcasp_pru_clk = { + .name = "mcasp_pru", + .parent = &pll0_sysclk2, + .lpsc = DA8XX_LPSC1_McASP0, + .gpsc = 1, + .flags = DA850_CLK_ASYNC3, +}; + static struct clk lcdc_clk = { .name = "lcdc", .parent = &pll0_sysclk2, @@ -373,6 +387,7 @@ static struct clk_lookup da850_clks[] = { CLK(NULL, "tpcc1", &tpcc1_clk), CLK(NULL, "tptc2", &tptc2_clk), CLK(NULL, "uart0", &uart0_clk), + CLK(NULL, "pruss", &pru_clk), CLK(NULL, "uart1", &uart1_clk), CLK(NULL, "uart2", &uart2_clk), CLK(NULL, "aintc", &aintc_clk), @@ -381,6 +396,7 @@ static struct clk_lookup da850_clks[] = { CLK(NULL, "emif3", &emif3_clk), CLK(NULL, "arm", &arm_clk), CLK(NULL, "rmii", &rmii_clk), + CLK(NULL, "mcasp_pru", &mcasp_pru_clk), CLK("davinci_emac.1", NULL, &emac_clk), CLK("davinci-mcasp.0", NULL, &mcasp_clk), CLK("da8xx_lcdc.0", NULL, &lcdc_clk), diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c index 9eec630..25de36d 100644 --- a/arch/arm/mach-davinci/devices-da8xx.c +++ b/arch/arm/mach-davinci/devices-da8xx.c @@ -85,7 +85,100 @@ struct platform_device da8xx_serial_device = { }, }; -static const s8 da8xx_queue_tc_mapping[][2] = { + +#define OMAPL138_PRU_MEM_BASE 0x01C30000 + +#define OMAPL138_INT_PRU_SUART_1 IRQ_DA8XX_EVTOUT0 +#define OMAPL138_INT_PRU_SUART_2 IRQ_DA8XX_EVTOUT1 +#define OMAPL138_INT_PRU_SUART_3 IRQ_DA8XX_EVTOUT2 +#define OMAPL138_INT_PRU_SUART_4 IRQ_DA8XX_EVTOUT3 +#define OMAPL138_INT_PRU_SUART_5 IRQ_DA8XX_EVTOUT4 +#define OMAPL138_INT_PRU_SUART_6 IRQ_DA8XX_EVTOUT5 +#define OMAPL138_INT_PRU_SUART_7 IRQ_DA8XX_EVTOUT6 +#define OMAPL138_INT_PRU_SUART_8 IRQ_DA8XX_EVTOUT7 + +static struct resource omapl138_pru_suart_resources[] = { + { + .name = "omapl_pru_suart", + .start = OMAPL138_PRU_MEM_BASE, + .end = OMAPL138_PRU_MEM_BASE + 0xFFFF, + .flags = IORESOURCE_MEM, + }, + { + .start = DAVINCI_DA8XX_MCASP0_REG_BASE, + .end = DAVINCI_DA8XX_MCASP0_REG_BASE + (SZ_1K * 12) - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = DA8XX_PSC0_BASE, + .end = DA8XX_PSC0_BASE + (SZ_1K * 3) - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = DA8XX_PSC1_BASE, + .end = DA8XX_PSC1_BASE + (SZ_1K * 3) - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = DA8XX_SHARED_RAM_BASE, + .end = DA8XX_SHARED_RAM_BASE + (SZ_1K * 8) - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = OMAPL138_INT_PRU_SUART_1, + .end = OMAPL138_INT_PRU_SUART_1, + .flags = IORESOURCE_IRQ, + }, + { + .start = OMAPL138_INT_PRU_SUART_2, + .end = OMAPL138_INT_PRU_SUART_2, + .flags = IORESOURCE_IRQ, + }, + { + .start = OMAPL138_INT_PRU_SUART_3, + .end = OMAPL138_INT_PRU_SUART_3, + .flags = IORESOURCE_IRQ, + }, + { + .start = OMAPL138_INT_PRU_SUART_4, + .end = OMAPL138_INT_PRU_SUART_4, + .flags = IORESOURCE_IRQ, + }, + { + .start = OMAPL138_INT_PRU_SUART_5, + .end = OMAPL138_INT_PRU_SUART_5, + .flags = IORESOURCE_IRQ, + }, + { + .start = OMAPL138_INT_PRU_SUART_6, + .end = OMAPL138_INT_PRU_SUART_6, + .flags = IORESOURCE_IRQ, + }, + { + .start = OMAPL138_INT_PRU_SUART_7, + .end = OMAPL138_INT_PRU_SUART_7, + .flags = IORESOURCE_IRQ, + }, + { + .start = OMAPL138_INT_PRU_SUART_8, + .end = OMAPL138_INT_PRU_SUART_8, + .flags = IORESOURCE_IRQ, + }, +}; + +struct platform_device omapl_pru_suart_device = { + .name = "davinci_pru_suart", + .id = -1, + .num_resources = ARRAY_SIZE(omapl138_pru_suart_resources), + .resource = omapl138_pru_suart_resources, +}; + +int __init da8xx_register_pru_suart(void) +{ + return platform_device_register(&omapl_pru_suart_device); +} + +static const s8 da8xx_queue_tc_mapping[][2] = { /* {event queue no, TC no} */ {0, 0}, {1, 1}, diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h index 4247b3f..940dbd6 100644 --- a/arch/arm/mach-davinci/include/mach/da8xx.h +++ b/arch/arm/mach-davinci/include/mach/da8xx.h @@ -74,6 +74,7 @@ int da8xx_register_watchdog(void); int da8xx_register_usb20(unsigned mA, unsigned potpgt); int da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata); int da8xx_register_emac(void); +int da8xx_register_pru_suart(void); int da8xx_register_lcdc(struct da8xx_lcdc_platform_data *pdata); int da8xx_register_mmcsd0(struct davinci_mmc_config *config); int da850_register_mmcsd1(struct davinci_mmc_config *config); diff --git a/arch/arm/mach-davinci/include/mach/memory.h b/arch/arm/mach-davinci/include/mach/memory.h index 22eb97c..d3e48d9 100644 --- a/arch/arm/mach-davinci/include/mach/memory.h +++ b/arch/arm/mach-davinci/include/mach/memory.h @@ -22,6 +22,7 @@ **************************************************************************/ #define DAVINCI_DDR_BASE 0x80000000 #define DA8XX_DDR_BASE 0xc0000000 +#define DA8XX_SHARED_RAM_BASE 0x80000000 #if defined(CONFIG_ARCH_DAVINCI_DA8XX) && defined(CONFIG_ARCH_DAVINCI_DMx) #error Cannot enable DaVinci and DA8XX platforms concurrently diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 212eb4c..407624e 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -199,6 +199,9 @@ /* TI OMAP-UART */ #define PORT_OMAP 96 +/* omapl pru uart emulation */ +#define PORT_OMAPL_PRU_SUART 97 + #ifdef __KERNEL__ #include <linux/compiler.h> -- 1.7.2.3 _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
