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>
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@ -44,6 +44,7 @@ parameter is applicable:
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AVR32 AVR32 architecture is enabled.
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AX25 Appropriate AX.25 support is enabled.
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BLACKFIN Blackfin architecture is enabled.
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CMA Contiguous Memory Area support is enabled.
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DRM Direct Rendering Management support is enabled.
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DYNAMIC_DEBUG Build in debug messages and enable them at runtime
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EDD BIOS Enhanced Disk Drive Services (EDD) is enabled
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@ -2663,6 +2664,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
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Useful for devices that are detected asynchronously
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(e.g. USB and MMC devices).
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rproc_mem=nn[KMG][@address]
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[KNL,ARM,CMA] Remoteproc physical memory block.
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Memory area to be used by remote processor image,
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managed by CMA.
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rw [KNL] Mount root device read-write on boot
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S [KNL] Run init in single mode
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@ -12,7 +12,7 @@
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*/
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/dma-contiguous.h>
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#include <linux/serial_8250.h>
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#include <linux/ahci_platform.h>
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#include <linux/clk.h>
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@ -714,6 +714,92 @@ int __init da850_register_mmcsd1(struct davinci_mmc_config *config)
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}
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#endif
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static struct resource da8xx_rproc_resources[] = {
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{ /* DSP boot address */
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.start = DA8XX_SYSCFG0_BASE + DA8XX_HOST1CFG_REG,
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.end = DA8XX_SYSCFG0_BASE + DA8XX_HOST1CFG_REG + 3,
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.flags = IORESOURCE_MEM,
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},
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{ /* DSP interrupt registers */
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.start = DA8XX_SYSCFG0_BASE + DA8XX_CHIPSIG_REG,
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.end = DA8XX_SYSCFG0_BASE + DA8XX_CHIPSIG_REG + 7,
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.flags = IORESOURCE_MEM,
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},
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{ /* dsp irq */
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.start = IRQ_DA8XX_CHIPINT0,
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.end = IRQ_DA8XX_CHIPINT0,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device da8xx_dsp = {
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.name = "davinci-rproc",
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.dev = {
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.coherent_dma_mask = DMA_BIT_MASK(32),
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},
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.num_resources = ARRAY_SIZE(da8xx_rproc_resources),
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.resource = da8xx_rproc_resources,
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};
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#if IS_ENABLED(CONFIG_DA8XX_REMOTEPROC)
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static phys_addr_t rproc_base __initdata;
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static unsigned long rproc_size __initdata;
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static int __init early_rproc_mem(char *p)
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{
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char *endp;
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if (p == NULL)
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return 0;
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rproc_size = memparse(p, &endp);
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if (*endp == '@')
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rproc_base = memparse(endp + 1, NULL);
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return 0;
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}
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early_param("rproc_mem", early_rproc_mem);
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void __init da8xx_rproc_reserve_cma(void)
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{
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int ret;
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if (!rproc_base || !rproc_size) {
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pr_err("%s: 'rproc_mem=nn@address' badly specified\n"
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" 'nn' and 'address' must both be non-zero\n",
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__func__);
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return;
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}
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pr_info("%s: reserving 0x%lx @ 0x%lx...\n",
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__func__, rproc_size, (unsigned long)rproc_base);
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ret = dma_declare_contiguous(&da8xx_dsp.dev, rproc_size, rproc_base, 0);
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if (ret)
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pr_err("%s: dma_declare_contiguous failed %d\n", __func__, ret);
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}
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#else
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void __init da8xx_rproc_reserve_cma(void)
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{
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}
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#endif
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int __init da8xx_register_rproc(void)
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{
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int ret;
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ret = platform_device_register(&da8xx_dsp);
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if (ret)
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pr_err("%s: can't register DSP device: %d\n", __func__, ret);
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return ret;
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};
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static struct resource da8xx_rtc_resources[] = {
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{
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.start = DA8XX_RTC_BASE,
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@ -54,6 +54,8 @@ extern unsigned int da850_max_speed;
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#define DA8XX_SYSCFG0_BASE (IO_PHYS + 0x14000)
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#define DA8XX_SYSCFG0_VIRT(x) (da8xx_syscfg0_base + (x))
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#define DA8XX_JTAG_ID_REG 0x18
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#define DA8XX_HOST1CFG_REG 0x44
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#define DA8XX_CHIPSIG_REG 0x174
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#define DA8XX_CFGCHIP0_REG 0x17c
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#define DA8XX_CFGCHIP1_REG 0x180
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#define DA8XX_CFGCHIP2_REG 0x184
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@ -105,6 +107,8 @@ int __init da850_register_vpif_display
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int __init da850_register_vpif_capture
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(struct vpif_capture_config *capture_config);
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void da8xx_restart(char mode, const char *cmd);
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void da8xx_rproc_reserve_cma(void);
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int da8xx_register_rproc(void);
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extern struct platform_device da8xx_serial_device;
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extern struct emac_platform_data da8xx_emac_pdata;
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