| /* |
| * This file is part of the coreboot project. |
| * |
| * 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/azalia_device.h> |
| #include <device/mmio.h> |
| #include <delay.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 reg32; |
| int count; |
| |
| /* Write (val & mask) to port */ |
| val &= mask; |
| reg32 = read32(port); |
| reg32 &= ~mask; |
| reg32 |= val; |
| write32(port, reg32); |
| |
| /* 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); |
| reg32 = read32(port); |
| reg32 &= mask; |
| } while ((reg32 != val) && --count); |
| |
| /* Timeout occurred */ |
| if (!count) |
| return -1; |
| return 0; |
| } |
| |
| static int codec_detect(u8 *base) |
| { |
| u32 reg32; |
| int count; |
| |
| /* Set Bit 0 to 1 to exit reset state (BAR + 0x8)[0] */ |
| if (set_bits(base + 0x08, 1, 1) == -1) |
| goto no_codec; |
| |
| /* clear STATESTS bits (BAR + 0xE)[2:0] */ |
| reg32 = read32(base + 0x0E); |
| reg32 |= 7; |
| write32(base + 0x0E, reg32); |
| |
| /* 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); |
| reg32 = read32(base + 0x0E); |
| } while ((reg32 != 0) && --count); |
| /* Timeout occurred */ |
| if (!count) |
| goto no_codec; |
| |
| /* 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; |
| |
| /* Read in Codec location (BAR + 0xe)[2..0] */ |
| reg32 = read32(base + 0xe); |
| reg32 &= 0x0f; |
| if (!reg32) |
| goto no_codec; |
| |
| return reg32; |
| |
| no_codec: |
| /* Codec Not found */ |
| /* Put HDA back in reset (BAR + 0x8) [0] */ |
| set_bits(base + 0x08, 1, 0); |
| printk(BIOS_DEBUG, "azalia_audio: No codec!\n"); |
| return 0; |
| } |
| |
| static u32 find_verb(struct device *dev, u32 viddid, const u32 **verb) |
| { |
| printk(BIOS_DEBUG, "azalia_audio: dev=%s\n", dev_path(dev)); |
| printk(BIOS_DEBUG, "azalia_audio: Reading viddid=%x\n", viddid); |
| |
| int idx = 0; |
| |
| while (idx < (cim_verb_data_size / sizeof(u32))) { |
| u32 verb_size = 4 * cim_verb_data[idx + 2]; // in u32 |
| if (cim_verb_data[idx] != viddid) { |
| idx += verb_size + 3; // skip verb + header |
| continue; |
| } |
| *verb = &cim_verb_data[idx + 3]; |
| return verb_size; |
| } |
| |
| /* Not all codecs need to load another verb */ |
| 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(u8 *base) |
| { |
| /* Use a 50 usec timeout - the Linux kernel uses the |
| * same duration */ |
| |
| int timeout = 50; |
| |
| while (timeout--) { |
| u32 reg32 = read32(base + HDA_ICII_REG); |
| if (!(reg32 & 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(u8 *base) |
| { |
| /* Use a 50 usec timeout - the Linux kernel uses the |
| * same duration */ |
| |
| int timeout = 25; |
| |
| write32(base + HDA_ICII_REG, |
| HDA_ICII_VALID | HDA_ICII_BUSY); |
| while (timeout--) { |
| udelay(1); |
| } |
| timeout = 50; |
| while (timeout--) { |
| u32 reg32 = read32(base + HDA_ICII_REG); |
| if ((reg32 & (HDA_ICII_VALID | HDA_ICII_BUSY)) == |
| HDA_ICII_VALID) |
| return 0; |
| udelay(1); |
| } |
| |
| return -1; |
| } |
| |
| static void codec_init(struct device *dev, u8 *base, int addr) |
| { |
| u32 reg32; |
| const u32 *verb; |
| u32 verb_size; |
| int i; |
| |
| printk(BIOS_DEBUG, "azalia_audio: Initializing codec #%d\n", addr); |
| |
| /* 1 */ |
| if (wait_for_ready(base) == -1) |
| return; |
| |
| reg32 = (addr << 28) | 0x000f0000; |
| write32(base + 0x60, reg32); |
| |
| if (wait_for_valid(base) == -1) |
| return; |
| |
| reg32 = read32(base + 0x64); |
| |
| /* 2 */ |
| printk(BIOS_DEBUG, "azalia_audio: codec viddid: %08x\n", reg32); |
| verb_size = find_verb(dev, reg32, &verb); |
| |
| if (!verb_size) { |
| printk(BIOS_DEBUG, "azalia_audio: No verb!\n"); |
| return; |
| } |
| printk(BIOS_DEBUG, "azalia_audio: verb_size: %d\n", verb_size); |
| |
| /* 3 */ |
| for (i = 0; i < verb_size; i++) { |
| if (wait_for_ready(base) == -1) |
| return; |
| |
| write32(base + 0x60, verb[i]); |
| |
| if (wait_for_valid(base) == -1) |
| return; |
| } |
| printk(BIOS_DEBUG, "azalia_audio: verb loaded.\n"); |
| } |
| |
| static void codecs_init(struct device *dev, u8 *base, u32 codec_mask) |
| { |
| int i; |
| |
| for (i = 2; i >= 0; i--) { |
| if (codec_mask & (1 << i)) |
| codec_init(dev, base, i); |
| } |
| } |
| |
| void azalia_audio_init(struct device *dev) |
| { |
| u8 *base; |
| struct resource *res; |
| u32 codec_mask; |
| |
| res = find_resource(dev, 0x10); |
| if (!res) |
| return; |
| |
| // NOTE this will break as soon as the azalia_audio get's a bar above |
| // 4G. Is there anything we can do about it? |
| base = res2mmio(res, 0, 0); |
| printk(BIOS_DEBUG, "azalia_audio: base = %p\n", base); |
| codec_mask = codec_detect(base); |
| |
| if (codec_mask) { |
| printk(BIOS_DEBUG, "azalia_audio: codec_mask = %02x\n", |
| codec_mask); |
| codecs_init(dev, base, codec_mask); |
| } |
| } |
| |
| struct pci_operations azalia_audio_pci_ops = { |
| .set_subsystem = pci_dev_set_subsystem, |
| }; |
| |
| struct device_operations default_azalia_audio_ops = { |
| .read_resources = pci_dev_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = azalia_audio_init, |
| .scan_bus = 0, |
| .ops_pci = &azalia_audio_pci_ops, |
| }; |