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author | Robert Tivy <rtivy@ti.com> | 2013-03-29 01:41:46 (GMT) |
---|---|---|
committer | Sekhar Nori <nsekhar@ti.com> | 2013-04-17 13:56:40 (GMT) |
commit | 5c71d6181f5c23c35415bddf1414f840e9149f8c (patch) | |
tree | ee684a2f80a7bf4cc555e8150ef6fbafc6e96778 /arch/arm/mach-davinci | |
parent | 93bd65150e4ee783b7366fd0e8172f347515df61 (diff) | |
download | linux-5c71d6181f5c23c35415bddf1414f840e9149f8c.tar.xz |
ARM: davinci: da8xx: add remoteproc support
Add remoteproc platform device for controlling the DSP
on da8xx. The patch uses CMA-based reservation of physical
memory block for DSP use. A new kernel command-line parameter
has been added to allow boot-time specification of the physical
memory block.
Signed-off-by: Robert Tivy <rtivy@ti.com>
[nsekhar@ti.com: edit commit message for readability and
style improvements]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Diffstat (limited to 'arch/arm/mach-davinci')
-rw-r--r-- | arch/arm/mach-davinci/devices-da8xx.c | 88 | ||||
-rw-r--r-- | arch/arm/mach-davinci/include/mach/da8xx.h | 4 |
2 files changed, 91 insertions, 1 deletions
diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c index cb97e07..bf57252 100644 --- a/arch/arm/mach-davinci/devices-da8xx.c +++ b/arch/arm/mach-davinci/devices-da8xx.c @@ -12,7 +12,7 @@ */ #include <linux/init.h> #include <linux/platform_device.h> -#include <linux/dma-mapping.h> +#include <linux/dma-contiguous.h> #include <linux/serial_8250.h> #include <linux/ahci_platform.h> #include <linux/clk.h> @@ -714,6 +714,92 @@ int __init da850_register_mmcsd1(struct davinci_mmc_config *config) } #endif +static struct resource da8xx_rproc_resources[] = { + { /* DSP boot address */ + .start = DA8XX_SYSCFG0_BASE + DA8XX_HOST1CFG_REG, + .end = DA8XX_SYSCFG0_BASE + DA8XX_HOST1CFG_REG + 3, + .flags = IORESOURCE_MEM, + }, + { /* DSP interrupt registers */ + .start = DA8XX_SYSCFG0_BASE + DA8XX_CHIPSIG_REG, + .end = DA8XX_SYSCFG0_BASE + DA8XX_CHIPSIG_REG + 7, + .flags = IORESOURCE_MEM, + }, + { /* dsp irq */ + .start = IRQ_DA8XX_CHIPINT0, + .end = IRQ_DA8XX_CHIPINT0, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device da8xx_dsp = { + .name = "davinci-rproc", + .dev = { + .coherent_dma_mask = DMA_BIT_MASK(32), + }, + .num_resources = ARRAY_SIZE(da8xx_rproc_resources), + .resource = da8xx_rproc_resources, +}; + +#if IS_ENABLED(CONFIG_DA8XX_REMOTEPROC) + +static phys_addr_t rproc_base __initdata; +static unsigned long rproc_size __initdata; + +static int __init early_rproc_mem(char *p) +{ + char *endp; + + if (p == NULL) + return 0; + + rproc_size = memparse(p, &endp); + if (*endp == '@') + rproc_base = memparse(endp + 1, NULL); + + return 0; +} +early_param("rproc_mem", early_rproc_mem); + +void __init da8xx_rproc_reserve_cma(void) +{ + int ret; + + if (!rproc_base || !rproc_size) { + pr_err("%s: 'rproc_mem=nn@address' badly specified\n" + " 'nn' and 'address' must both be non-zero\n", + __func__); + + return; + } + + pr_info("%s: reserving 0x%lx @ 0x%lx...\n", + __func__, rproc_size, (unsigned long)rproc_base); + + ret = dma_declare_contiguous(&da8xx_dsp.dev, rproc_size, rproc_base, 0); + if (ret) + pr_err("%s: dma_declare_contiguous failed %d\n", __func__, ret); +} + +#else + +void __init da8xx_rproc_reserve_cma(void) +{ +} + +#endif + +int __init da8xx_register_rproc(void) +{ + int ret; + + ret = platform_device_register(&da8xx_dsp); + if (ret) + pr_err("%s: can't register DSP device: %d\n", __func__, ret); + + return ret; +}; + static struct resource da8xx_rtc_resources[] = { { .start = DA8XX_RTC_BASE, diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h index be77ce2..2e1c9ea 100644 --- a/arch/arm/mach-davinci/include/mach/da8xx.h +++ b/arch/arm/mach-davinci/include/mach/da8xx.h @@ -54,6 +54,8 @@ extern unsigned int da850_max_speed; #define DA8XX_SYSCFG0_BASE (IO_PHYS + 0x14000) #define DA8XX_SYSCFG0_VIRT(x) (da8xx_syscfg0_base + (x)) #define DA8XX_JTAG_ID_REG 0x18 +#define DA8XX_HOST1CFG_REG 0x44 +#define DA8XX_CHIPSIG_REG 0x174 #define DA8XX_CFGCHIP0_REG 0x17c #define DA8XX_CFGCHIP1_REG 0x180 #define DA8XX_CFGCHIP2_REG 0x184 @@ -105,6 +107,8 @@ int __init da850_register_vpif_display int __init da850_register_vpif_capture (struct vpif_capture_config *capture_config); void da8xx_restart(char mode, const char *cmd); +void da8xx_rproc_reserve_cma(void); +int da8xx_register_rproc(void); extern struct platform_device da8xx_serial_device; extern struct emac_platform_data da8xx_emac_pdata; |