diff options
Diffstat (limited to 'arch/arm/mach-bcm283x/msg.c')
| -rw-r--r-- | arch/arm/mach-bcm283x/msg.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/arch/arm/mach-bcm283x/msg.c b/arch/arm/mach-bcm283x/msg.c new file mode 100644 index 00000000000..92e93ad9e55 --- /dev/null +++ b/arch/arm/mach-bcm283x/msg.c @@ -0,0 +1,154 @@ +/* + * (C) Copyright 2012 Stephen Warren + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <memalign.h> +#include <phys2bus.h> +#include <asm/arch/mbox.h> + +struct msg_set_power_state { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_set_power_state set_power_state; + u32 end_tag; +}; + +struct msg_get_clock_rate { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; + u32 end_tag; +}; + +struct msg_query { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_physical_w_h physical_w_h; + u32 end_tag; +}; + +struct msg_setup { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_physical_w_h physical_w_h; + struct bcm2835_mbox_tag_virtual_w_h virtual_w_h; + struct bcm2835_mbox_tag_depth depth; + struct bcm2835_mbox_tag_pixel_order pixel_order; + struct bcm2835_mbox_tag_alpha_mode alpha_mode; + struct bcm2835_mbox_tag_virtual_offset virtual_offset; + struct bcm2835_mbox_tag_overscan overscan; + struct bcm2835_mbox_tag_allocate_buffer allocate_buffer; + struct bcm2835_mbox_tag_pitch pitch; + u32 end_tag; +}; + +int bcm2835_power_on_module(u32 module) +{ + ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); + int ret; + + BCM2835_MBOX_INIT_HDR(msg_pwr); + BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, + SET_POWER_STATE); + msg_pwr->set_power_state.body.req.device_id = module; + msg_pwr->set_power_state.body.req.state = + BCM2835_MBOX_SET_POWER_STATE_REQ_ON | + BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; + + ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, + &msg_pwr->hdr); + if (ret) { + printf("bcm2835: Could not set module %u power state\n", + module); + return -EIO; + } + + return 0; +} + +int bcm2835_get_mmc_clock(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); + int ret; + + ret = bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); + if (ret) + return ret; + + BCM2835_MBOX_INIT_HDR(msg_clk); + BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); + msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; + + ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); + if (ret) { + printf("bcm2835: Could not query eMMC clock rate\n"); + return -EIO; + } + + return msg_clk->get_clock_rate.body.resp.rate_hz; +} + +int bcm2835_get_video_size(int *widthp, int *heightp) +{ + ALLOC_CACHE_ALIGN_BUFFER(struct msg_query, msg_query, 1); + int ret; + + BCM2835_MBOX_INIT_HDR(msg_query); + BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h, + GET_PHYSICAL_W_H); + ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr); + if (ret) { + printf("bcm2835: Could not query display resolution\n"); + return ret; + } + *widthp = msg_query->physical_w_h.body.resp.width; + *heightp = msg_query->physical_w_h.body.resp.height; + + return 0; +} + +int bcm2835_set_video_params(int *widthp, int *heightp, int depth_bpp, + int pixel_order, int alpha_mode, ulong *fb_basep, + ulong *fb_sizep, int *pitchp) +{ + ALLOC_CACHE_ALIGN_BUFFER(struct msg_setup, msg_setup, 1); + int ret; + + BCM2835_MBOX_INIT_HDR(msg_setup); + BCM2835_MBOX_INIT_TAG(&msg_setup->physical_w_h, SET_PHYSICAL_W_H); + msg_setup->physical_w_h.body.req.width = *widthp; + msg_setup->physical_w_h.body.req.height = *heightp; + BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_w_h, SET_VIRTUAL_W_H); + msg_setup->virtual_w_h.body.req.width = *widthp; + msg_setup->virtual_w_h.body.req.height = *heightp; + BCM2835_MBOX_INIT_TAG(&msg_setup->depth, SET_DEPTH); + msg_setup->depth.body.req.bpp = 32; + BCM2835_MBOX_INIT_TAG(&msg_setup->pixel_order, SET_PIXEL_ORDER); + msg_setup->pixel_order.body.req.order = pixel_order; + BCM2835_MBOX_INIT_TAG(&msg_setup->alpha_mode, SET_ALPHA_MODE); + msg_setup->alpha_mode.body.req.alpha = alpha_mode; + BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_offset, SET_VIRTUAL_OFFSET); + msg_setup->virtual_offset.body.req.x = 0; + msg_setup->virtual_offset.body.req.y = 0; + BCM2835_MBOX_INIT_TAG(&msg_setup->overscan, SET_OVERSCAN); + msg_setup->overscan.body.req.top = 0; + msg_setup->overscan.body.req.bottom = 0; + msg_setup->overscan.body.req.left = 0; + msg_setup->overscan.body.req.right = 0; + BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER); + msg_setup->allocate_buffer.body.req.alignment = 0x100; + BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_setup->pitch, GET_PITCH); + + ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr); + if (ret) { + printf("bcm2835: Could not configure display\n"); + return ret; + } + *widthp = msg_setup->physical_w_h.body.resp.width; + *heightp = msg_setup->physical_w_h.body.resp.height; + *pitchp = msg_setup->pitch.body.resp.pitch; + *fb_basep = bus_to_phys( + msg_setup->allocate_buffer.body.resp.fb_address); + *fb_sizep = msg_setup->allocate_buffer.body.resp.fb_size; + + return 0; +} |