438 lines
14 KiB
C
438 lines
14 KiB
C
/*
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* Raspberry Pi emulation (c) 2012 Gregory Estrade
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* This code is licensed under the GNU GPLv2 and later.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "hw/misc/bcm2835_property.h"
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#include "hw/misc/bcm2835_mbox_defs.h"
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#include "sysemu/dma.h"
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#include "qemu/log.h"
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/* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */
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static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
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{
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uint32_t tag;
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uint32_t bufsize;
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uint32_t tot_len;
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size_t resplen;
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uint32_t tmp;
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int n;
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uint32_t offset, length, color;
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/*
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* Copy the current state of the framebuffer config; we will update
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* this copy as we process tags and then ask the framebuffer to use
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* it at the end.
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*/
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BCM2835FBConfig fbconfig = s->fbdev->config;
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bool fbconfig_updated = false;
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value &= ~0xf;
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s->addr = value;
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tot_len = ldl_le_phys(&s->dma_as, value);
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/* @(addr + 4) : Buffer response code */
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value = s->addr + 8;
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while (value + 8 <= s->addr + tot_len) {
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tag = ldl_le_phys(&s->dma_as, value);
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bufsize = ldl_le_phys(&s->dma_as, value + 4);
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/* @(value + 8) : Request/response indicator */
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resplen = 0;
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switch (tag) {
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case 0x00000000: /* End tag */
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break;
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case 0x00000001: /* Get firmware revision */
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stl_le_phys(&s->dma_as, value + 12, 346337);
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resplen = 4;
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break;
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case 0x00010001: /* Get board model */
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qemu_log_mask(LOG_UNIMP,
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"bcm2835_property: %x get board model NYI\n", tag);
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resplen = 4;
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break;
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case 0x00010002: /* Get board revision */
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stl_le_phys(&s->dma_as, value + 12, s->board_rev);
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resplen = 4;
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break;
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case 0x00010003: /* Get board MAC address */
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resplen = sizeof(s->macaddr.a);
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dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen);
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break;
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case 0x00010004: /* Get board serial */
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qemu_log_mask(LOG_UNIMP,
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"bcm2835_property: %x get board serial NYI\n", tag);
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resplen = 8;
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break;
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case 0x00010005: /* Get ARM memory */
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/* base */
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stl_le_phys(&s->dma_as, value + 12, 0);
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/* size */
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stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base);
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resplen = 8;
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break;
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case 0x00010006: /* Get VC memory */
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/* base */
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stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base);
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/* size */
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stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size);
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resplen = 8;
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break;
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case 0x00028001: /* Set power state */
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/* Assume that whatever device they asked for exists,
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* and we'll just claim we set it to the desired state
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*/
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tmp = ldl_le_phys(&s->dma_as, value + 16);
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stl_le_phys(&s->dma_as, value + 16, (tmp & 1));
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resplen = 8;
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break;
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/* Clocks */
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case 0x00030001: /* Get clock state */
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stl_le_phys(&s->dma_as, value + 16, 0x1);
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resplen = 8;
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break;
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case 0x00038001: /* Set clock state */
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qemu_log_mask(LOG_UNIMP,
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"bcm2835_property: %x set clock state NYI\n", tag);
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resplen = 8;
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break;
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case 0x00030002: /* Get clock rate */
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case 0x00030004: /* Get max clock rate */
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case 0x00030007: /* Get min clock rate */
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switch (ldl_le_phys(&s->dma_as, value + 12)) {
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case 1: /* EMMC */
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stl_le_phys(&s->dma_as, value + 16, 50000000);
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break;
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case 2: /* UART */
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stl_le_phys(&s->dma_as, value + 16, 3000000);
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break;
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default:
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stl_le_phys(&s->dma_as, value + 16, 700000000);
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break;
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}
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resplen = 8;
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break;
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case 0x00038002: /* Set clock rate */
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case 0x00038004: /* Set max clock rate */
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case 0x00038007: /* Set min clock rate */
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qemu_log_mask(LOG_UNIMP,
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"bcm2835_property: %x set clock rates NYI\n", tag);
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resplen = 8;
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break;
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/* Temperature */
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case 0x00030006: /* Get temperature */
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stl_le_phys(&s->dma_as, value + 16, 25000);
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resplen = 8;
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break;
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case 0x0003000A: /* Get max temperature */
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stl_le_phys(&s->dma_as, value + 16, 99000);
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resplen = 8;
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break;
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/* Frame buffer */
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case 0x00040001: /* Allocate buffer */
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stl_le_phys(&s->dma_as, value + 12, fbconfig.base);
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stl_le_phys(&s->dma_as, value + 16,
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bcm2835_fb_get_size(&fbconfig));
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resplen = 8;
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break;
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case 0x00048001: /* Release buffer */
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resplen = 0;
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break;
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case 0x00040002: /* Blank screen */
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resplen = 4;
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break;
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case 0x00044003: /* Test physical display width/height */
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case 0x00044004: /* Test virtual display width/height */
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resplen = 8;
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break;
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case 0x00048003: /* Set physical display width/height */
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fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12);
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fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16);
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bcm2835_fb_validate_config(&fbconfig);
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fbconfig_updated = true;
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/* fall through */
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case 0x00040003: /* Get physical display width/height */
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stl_le_phys(&s->dma_as, value + 12, fbconfig.xres);
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stl_le_phys(&s->dma_as, value + 16, fbconfig.yres);
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resplen = 8;
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break;
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case 0x00048004: /* Set virtual display width/height */
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fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12);
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fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16);
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bcm2835_fb_validate_config(&fbconfig);
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fbconfig_updated = true;
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/* fall through */
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case 0x00040004: /* Get virtual display width/height */
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stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual);
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stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual);
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resplen = 8;
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break;
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case 0x00044005: /* Test depth */
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resplen = 4;
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break;
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case 0x00048005: /* Set depth */
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fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12);
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bcm2835_fb_validate_config(&fbconfig);
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fbconfig_updated = true;
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/* fall through */
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case 0x00040005: /* Get depth */
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stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp);
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resplen = 4;
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break;
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case 0x00044006: /* Test pixel order */
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resplen = 4;
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break;
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case 0x00048006: /* Set pixel order */
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fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12);
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bcm2835_fb_validate_config(&fbconfig);
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fbconfig_updated = true;
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/* fall through */
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case 0x00040006: /* Get pixel order */
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stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo);
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resplen = 4;
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break;
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case 0x00044007: /* Test pixel alpha */
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resplen = 4;
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break;
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case 0x00048007: /* Set alpha */
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fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12);
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bcm2835_fb_validate_config(&fbconfig);
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fbconfig_updated = true;
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/* fall through */
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case 0x00040007: /* Get alpha */
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stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha);
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resplen = 4;
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break;
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case 0x00040008: /* Get pitch */
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stl_le_phys(&s->dma_as, value + 12,
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bcm2835_fb_get_pitch(&fbconfig));
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resplen = 4;
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break;
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case 0x00044009: /* Test virtual offset */
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resplen = 8;
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break;
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case 0x00048009: /* Set virtual offset */
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fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12);
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fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16);
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bcm2835_fb_validate_config(&fbconfig);
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fbconfig_updated = true;
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/* fall through */
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case 0x00040009: /* Get virtual offset */
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stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset);
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stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset);
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resplen = 8;
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break;
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case 0x0004000a: /* Get/Test/Set overscan */
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case 0x0004400a:
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case 0x0004800a:
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stl_le_phys(&s->dma_as, value + 12, 0);
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stl_le_phys(&s->dma_as, value + 16, 0);
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stl_le_phys(&s->dma_as, value + 20, 0);
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stl_le_phys(&s->dma_as, value + 24, 0);
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resplen = 16;
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break;
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case 0x0004800b: /* Set palette */
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offset = ldl_le_phys(&s->dma_as, value + 12);
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length = ldl_le_phys(&s->dma_as, value + 16);
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n = 0;
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while (n < length - offset) {
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color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2));
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stl_le_phys(&s->dma_as,
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s->fbdev->vcram_base + ((offset + n) << 2), color);
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n++;
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}
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stl_le_phys(&s->dma_as, value + 12, 0);
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resplen = 4;
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break;
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case 0x00060001: /* Get DMA channels */
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/* channels 2-5 */
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stl_le_phys(&s->dma_as, value + 12, 0x003C);
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resplen = 4;
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break;
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case 0x00050001: /* Get command line */
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resplen = 0;
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break;
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default:
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qemu_log_mask(LOG_GUEST_ERROR,
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"bcm2835_property: unhandled tag %08x\n", tag);
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break;
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}
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if (tag == 0) {
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break;
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}
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stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen);
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value += bufsize + 12;
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}
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/* Reconfigure framebuffer if required */
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if (fbconfig_updated) {
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bcm2835_fb_reconfigure(s->fbdev, &fbconfig);
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}
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/* Buffer response code */
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stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31));
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}
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static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
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unsigned size)
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{
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BCM2835PropertyState *s = opaque;
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uint32_t res = 0;
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switch (offset) {
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case MBOX_AS_DATA:
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res = MBOX_CHAN_PROPERTY | s->addr;
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s->pending = false;
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qemu_set_irq(s->mbox_irq, 0);
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break;
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case MBOX_AS_PENDING:
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res = s->pending;
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break;
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default:
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qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
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__func__, offset);
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return 0;
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}
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return res;
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}
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static void bcm2835_property_write(void *opaque, hwaddr offset,
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uint64_t value, unsigned size)
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{
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BCM2835PropertyState *s = opaque;
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switch (offset) {
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case MBOX_AS_DATA:
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/* bcm2835_mbox should check our pending status before pushing */
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assert(!s->pending);
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s->pending = true;
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bcm2835_property_mbox_push(s, value);
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qemu_set_irq(s->mbox_irq, 1);
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break;
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default:
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qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
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__func__, offset);
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return;
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}
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}
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static const MemoryRegionOps bcm2835_property_ops = {
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.read = bcm2835_property_read,
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.write = bcm2835_property_write,
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.endianness = DEVICE_NATIVE_ENDIAN,
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.valid.min_access_size = 4,
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.valid.max_access_size = 4,
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};
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static const VMStateDescription vmstate_bcm2835_property = {
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.name = TYPE_BCM2835_PROPERTY,
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.version_id = 1,
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.minimum_version_id = 1,
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.fields = (VMStateField[]) {
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VMSTATE_MACADDR(macaddr, BCM2835PropertyState),
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VMSTATE_UINT32(addr, BCM2835PropertyState),
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VMSTATE_BOOL(pending, BCM2835PropertyState),
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VMSTATE_END_OF_LIST()
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}
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};
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static void bcm2835_property_init(Object *obj)
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{
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BCM2835PropertyState *s = BCM2835_PROPERTY(obj);
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memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
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TYPE_BCM2835_PROPERTY, 0x10);
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sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
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sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
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}
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static void bcm2835_property_reset(DeviceState *dev)
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{
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BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
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s->pending = false;
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}
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static void bcm2835_property_realize(DeviceState *dev, Error **errp)
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{
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BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
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Object *obj;
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Error *err = NULL;
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obj = object_property_get_link(OBJECT(dev), "fb", &err);
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if (obj == NULL) {
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error_setg(errp, "%s: required fb link not found: %s",
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__func__, error_get_pretty(err));
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return;
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}
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s->fbdev = BCM2835_FB(obj);
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obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
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if (obj == NULL) {
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error_setg(errp, "%s: required dma-mr link not found: %s",
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__func__, error_get_pretty(err));
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return;
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}
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s->dma_mr = MEMORY_REGION(obj);
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address_space_init(&s->dma_as, s->dma_mr, NULL);
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/* TODO: connect to MAC address of USB NIC device, once we emulate it */
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qemu_macaddr_default_if_unset(&s->macaddr);
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bcm2835_property_reset(dev);
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}
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static Property bcm2835_property_props[] = {
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DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0),
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DEFINE_PROP_END_OF_LIST()
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};
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static void bcm2835_property_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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dc->props = bcm2835_property_props;
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dc->realize = bcm2835_property_realize;
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dc->vmsd = &vmstate_bcm2835_property;
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}
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static TypeInfo bcm2835_property_info = {
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.name = TYPE_BCM2835_PROPERTY,
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.parent = TYPE_SYS_BUS_DEVICE,
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.instance_size = sizeof(BCM2835PropertyState),
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.class_init = bcm2835_property_class_init,
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.instance_init = bcm2835_property_init,
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};
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static void bcm2835_property_register_types(void)
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{
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type_register_static(&bcm2835_property_info);
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}
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type_init(bcm2835_property_register_types)
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