/* * This file is part of the coreboot project. * * Copyright (C) 2010 Advanced Micro Devices, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <console/console.h> #include <device/device.h> #include <device/pci.h> #include <device/pci_ids.h> #include <device/pci_ops.h> #include <device/mmio.h> #include <delay.h> #include "sb700.h" #define HDA_ICII_REG 0x68 #define HDA_ICII_BUSY (1 << 0) #define HDA_ICII_VALID (1 << 1) static int set_bits(void *port, u32 mask, u32 val) { u32 dword; int count; /* Write (val & ~mask) to port */ val &= mask; dword = read32(port); dword &= ~mask; dword |= val; write32(port, dword); /* Wait for readback of register to * match what was just written to it */ count = 50; do { /* Wait 1ms based on BKDG wait time */ mdelay(1); dword = read32(port); dword &= mask; } while ((dword != val) && --count); /* Timeout occurred */ if (!count) return -1; return 0; } static u32 codec_detect(void *base) { u32 dword; /* Set Bit0 to 0 to enter reset state (BAR + 0x8)[0] */ if (set_bits(base + 0x08, 1, 0) == -1) goto no_codec; /* Set Bit 0 to 1 to exit reset state (BAR + 0x8)[0] */ if (set_bits(base + 0x08, 1, 1) == -1) goto no_codec; /* Delay for 1 ms since the BKDG does */ mdelay(1); /* Read in Codec location (BAR + 0xe)[3..0]*/ dword = read32(base + 0xe); dword &= 0x0F; if (!dword) goto no_codec; return dword; no_codec: /* Codec Not found */ /* Put HDA back in reset (BAR + 0x8) [0] */ set_bits(base + 0x08, 1, 0); printk(BIOS_DEBUG, "No codec!\n"); return 0; } /** * Wait 50usec for the codec to indicate it is ready * no response would imply that the codec is non-operative */ static int wait_for_ready(void *base) { /* Use a 50 usec timeout - the Linux kernel uses the * same duration */ int timeout = 50; while (timeout--) { u32 dword = read32(base + HDA_ICII_REG); if (!(dword & HDA_ICII_BUSY)) return 0; udelay(1); } return -1; } /** * Wait 50usec for the codec to indicate that it accepted * the previous command. No response would imply that the code * is non-operative */ static int wait_for_valid(void *base) { /* Use a 50 usec timeout - the Linux kernel uses the * same duration */ int timeout = 50; while (timeout--) { u32 dword = read32(base + HDA_ICII_REG); if ((dword & (HDA_ICII_VALID | HDA_ICII_BUSY)) == HDA_ICII_VALID) return 0; udelay(1); } return -1; } static void codec_init(void *base, int addr) { u32 dword; /* 1 */ if (wait_for_ready(base) == -1) return; dword = (addr << 28) | 0x000f0000; write32(base + 0x60, dword); if (wait_for_valid(base) == -1) return; dword = read32(base + 0x64); /* 2 */ printk(BIOS_DEBUG, "%x(th) codec viddid: %08x\n", addr, dword); } static void codecs_init(void *base, u32 codec_mask) { int i; for (i = 2; i >= 0; i--) { if (codec_mask & (1 << i)) codec_init(base, i); } } static void hda_init(struct device *dev) { u8 byte; u32 dword; void *base; struct resource *res; u32 codec_mask; struct device *sm_dev; /* Enable azalia - PM_io 0x59[3], no ac97 in sb700. */ byte = pm_ioread(0x59); byte |= 1 << 3; pm_iowrite(0x59, byte); /* Find the SMBus */ sm_dev = dev_find_device(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SB700_SM, 0); /* Set routing pin - SMBus ExtFunc (0xf8/0xfc) */ pci_write_config32(sm_dev, 0xf8, 0x00); pci_write_config8(sm_dev, 0xfc, 0xAA); /* Set INTA - SMBus 0x63 [2..0] */ byte = pci_read_config8(sm_dev, 0x63); byte &= ~0x7; byte |= 0x0; /* INTA:0x0 - INTH:0x7 */ pci_write_config8(sm_dev, 0x63, byte); /* Program the 2C to 0x437b1002 */ dword = 0x437b1002; pci_write_config32(dev, 0x2c, dword); /* Read in BAR */ /* Is this right? HDA allows for a 64-bit BAR * but this is only setup for a 32-bit one */ res = find_resource(dev, 0x10); if (!res) return; base = res2mmio(res, 0, 0); printk(BIOS_DEBUG, "base = 0x%p\n", base); codec_mask = codec_detect(base); if (codec_mask) { printk(BIOS_DEBUG, "codec_mask = %02x\n", codec_mask); codecs_init(base, codec_mask); } } static struct pci_operations lops_pci = { .set_subsystem = pci_dev_set_subsystem, }; static struct device_operations hda_audio_ops = { .read_resources = pci_dev_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .init = hda_init, .scan_bus = 0, .ops_pci = &lops_pci, }; static const struct pci_driver hdaaudio_driver __pci_driver = { .ops = &hda_audio_ops, .vendor = PCI_VENDOR_ID_ATI, .device = PCI_DEVICE_ID_ATI_SB700_HDA, };