// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* cx18 firmware functions
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*
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* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
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* Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>
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*/
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#include "cx18-driver.h"
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#include "cx18-io.h"
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#include "cx18-scb.h"
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#include "cx18-irq.h"
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#include "cx18-firmware.h"
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#include "cx18-cards.h"
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#include <linux/firmware.h>
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#define CX18_PROC_SOFT_RESET 0xc70010
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#define CX18_DDR_SOFT_RESET 0xc70014
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#define CX18_CLOCK_SELECT1 0xc71000
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#define CX18_CLOCK_SELECT2 0xc71004
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#define CX18_HALF_CLOCK_SELECT1 0xc71008
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#define CX18_HALF_CLOCK_SELECT2 0xc7100C
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#define CX18_CLOCK_POLARITY1 0xc71010
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#define CX18_CLOCK_POLARITY2 0xc71014
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#define CX18_ADD_DELAY_ENABLE1 0xc71018
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#define CX18_ADD_DELAY_ENABLE2 0xc7101C
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#define CX18_CLOCK_ENABLE1 0xc71020
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#define CX18_CLOCK_ENABLE2 0xc71024
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#define CX18_REG_BUS_TIMEOUT_EN 0xc72024
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#define CX18_FAST_CLOCK_PLL_INT 0xc78000
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#define CX18_FAST_CLOCK_PLL_FRAC 0xc78004
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#define CX18_FAST_CLOCK_PLL_POST 0xc78008
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#define CX18_FAST_CLOCK_PLL_PRESCALE 0xc7800C
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#define CX18_FAST_CLOCK_PLL_ADJUST_BANDWIDTH 0xc78010
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#define CX18_SLOW_CLOCK_PLL_INT 0xc78014
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#define CX18_SLOW_CLOCK_PLL_FRAC 0xc78018
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#define CX18_SLOW_CLOCK_PLL_POST 0xc7801C
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#define CX18_MPEG_CLOCK_PLL_INT 0xc78040
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#define CX18_MPEG_CLOCK_PLL_FRAC 0xc78044
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#define CX18_MPEG_CLOCK_PLL_POST 0xc78048
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#define CX18_PLL_POWER_DOWN 0xc78088
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#define CX18_SW1_INT_STATUS 0xc73104
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#define CX18_SW1_INT_ENABLE_PCI 0xc7311C
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#define CX18_SW2_INT_SET 0xc73140
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#define CX18_SW2_INT_STATUS 0xc73144
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#define CX18_ADEC_CONTROL 0xc78120
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#define CX18_DDR_REQUEST_ENABLE 0xc80000
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#define CX18_DDR_CHIP_CONFIG 0xc80004
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#define CX18_DDR_REFRESH 0xc80008
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#define CX18_DDR_TIMING1 0xc8000C
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#define CX18_DDR_TIMING2 0xc80010
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#define CX18_DDR_POWER_REG 0xc8001C
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#define CX18_DDR_TUNE_LANE 0xc80048
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#define CX18_DDR_INITIAL_EMRS 0xc80054
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#define CX18_DDR_MB_PER_ROW_7 0xc8009C
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#define CX18_DDR_BASE_63_ADDR 0xc804FC
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#define CX18_WMB_CLIENT02 0xc90108
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#define CX18_WMB_CLIENT05 0xc90114
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#define CX18_WMB_CLIENT06 0xc90118
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#define CX18_WMB_CLIENT07 0xc9011C
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#define CX18_WMB_CLIENT08 0xc90120
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#define CX18_WMB_CLIENT09 0xc90124
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#define CX18_WMB_CLIENT10 0xc90128
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#define CX18_WMB_CLIENT11 0xc9012C
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#define CX18_WMB_CLIENT12 0xc90130
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#define CX18_WMB_CLIENT13 0xc90134
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#define CX18_WMB_CLIENT14 0xc90138
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#define CX18_DSP0_INTERRUPT_MASK 0xd0004C
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#define APU_ROM_SYNC1 0x6D676553 /* "mgeS" */
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#define APU_ROM_SYNC2 0x72646548 /* "rdeH" */
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struct cx18_apu_rom_seghdr {
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u32 sync1;
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u32 sync2;
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u32 addr;
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u32 size;
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};
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static int load_cpu_fw_direct(const char *fn, u8 __iomem *mem, struct cx18 *cx)
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{
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const struct firmware *fw = NULL;
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int i, j;
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unsigned size;
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u32 __iomem *dst = (u32 __iomem *)mem;
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const u32 *src;
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if (request_firmware(&fw, fn, &cx->pci_dev->dev)) {
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CX18_ERR("Unable to open firmware %s\n", fn);
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CX18_ERR("Did you put the firmware in the hotplug firmware directory?\n");
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return -ENOMEM;
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}
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src = (const u32 *)fw->data;
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for (i = 0; i < fw->size; i += 4096) {
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cx18_setup_page(cx, i);
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for (j = i; j < fw->size && j < i + 4096; j += 4) {
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/* no need for endianness conversion on the ppc */
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cx18_raw_writel(cx, *src, dst);
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if (cx18_raw_readl(cx, dst) != *src) {
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CX18_ERR("Mismatch at offset %x\n", i);
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release_firmware(fw);
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cx18_setup_page(cx, 0);
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return -EIO;
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}
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dst++;
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src++;
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}
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}
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if (!test_bit(CX18_F_I_LOADED_FW, &cx->i_flags))
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CX18_INFO("loaded %s firmware (%zu bytes)\n", fn, fw->size);
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size = fw->size;
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release_firmware(fw);
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cx18_setup_page(cx, SCB_OFFSET);
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return size;
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}
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static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx,
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u32 *entry_addr)
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{
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const struct firmware *fw = NULL;
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int i, j;
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unsigned size;
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const u32 *src;
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struct cx18_apu_rom_seghdr seghdr;
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const u8 *vers;
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u32 offset = 0;
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u32 apu_version = 0;
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int sz;
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if (request_firmware(&fw, fn, &cx->pci_dev->dev)) {
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CX18_ERR("unable to open firmware %s\n", fn);
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CX18_ERR("did you put the firmware in the hotplug firmware directory?\n");
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cx18_setup_page(cx, 0);
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return -ENOMEM;
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}
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*entry_addr = 0;
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src = (const u32 *)fw->data;
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vers = fw->data + sizeof(seghdr);
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sz = fw->size;
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apu_version = (vers[0] << 24) | (vers[4] << 16) | vers[32];
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while (offset + sizeof(seghdr) < fw->size) {
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const __le32 *shptr = (__force __le32 *)src + offset / 4;
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seghdr.sync1 = le32_to_cpu(shptr[0]);
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seghdr.sync2 = le32_to_cpu(shptr[1]);
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seghdr.addr = le32_to_cpu(shptr[2]);
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seghdr.size = le32_to_cpu(shptr[3]);
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offset += sizeof(seghdr);
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if (seghdr.sync1 != APU_ROM_SYNC1 ||
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seghdr.sync2 != APU_ROM_SYNC2) {
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offset += seghdr.size;
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continue;
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}
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CX18_DEBUG_INFO("load segment %x-%x\n", seghdr.addr,
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seghdr.addr + seghdr.size - 1);
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if (*entry_addr == 0)
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*entry_addr = seghdr.addr;
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if (offset + seghdr.size > sz)
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break;
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for (i = 0; i < seghdr.size; i += 4096) {
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cx18_setup_page(cx, seghdr.addr + i);
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for (j = i; j < seghdr.size && j < i + 4096; j += 4) {
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/* no need for endianness conversion on the ppc */
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cx18_raw_writel(cx, src[(offset + j) / 4],
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dst + seghdr.addr + j);
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if (cx18_raw_readl(cx, dst + seghdr.addr + j)
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!= src[(offset + j) / 4]) {
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CX18_ERR("Mismatch at offset %x\n",
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offset + j);
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release_firmware(fw);
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cx18_setup_page(cx, 0);
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return -EIO;
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}
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}
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}
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offset += seghdr.size;
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}
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if (!test_bit(CX18_F_I_LOADED_FW, &cx->i_flags))
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CX18_INFO("loaded %s firmware V%08x (%zu bytes)\n",
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fn, apu_version, fw->size);
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size = fw->size;
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release_firmware(fw);
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cx18_setup_page(cx, 0);
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return size;
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}
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void cx18_halt_firmware(struct cx18 *cx)
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{
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CX18_DEBUG_INFO("Preparing for firmware halt.\n");
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cx18_write_reg_expect(cx, 0x000F000F, CX18_PROC_SOFT_RESET,
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0x0000000F, 0x000F000F);
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cx18_write_reg_expect(cx, 0x00020002, CX18_ADEC_CONTROL,
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0x00000002, 0x00020002);
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}
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void cx18_init_power(struct cx18 *cx, int lowpwr)
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{
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/* power-down Spare and AOM PLLs */
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/* power-up fast, slow and mpeg PLLs */
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cx18_write_reg(cx, 0x00000008, CX18_PLL_POWER_DOWN);
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/* ADEC out of sleep */
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cx18_write_reg_expect(cx, 0x00020000, CX18_ADEC_CONTROL,
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0x00000000, 0x00020002);
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/*
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* The PLL parameters are based on the external crystal frequency that
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* would ideally be:
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*
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* NTSC Color subcarrier freq * 8 =
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* 4.5 MHz/286 * 455/2 * 8 = 28.63636363... MHz
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*
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* The accidents of history and rationale that explain from where this
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* combination of magic numbers originate can be found in:
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*
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* [1] Abrahams, I. C., "Choice of Chrominance Subcarrier Frequency in
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* the NTSC Standards", Proceedings of the I-R-E, January 1954, pp 79-80
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*
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* [2] Abrahams, I. C., "The 'Frequency Interleaving' Principle in the
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* NTSC Standards", Proceedings of the I-R-E, January 1954, pp 81-83
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*
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* As Mike Bradley has rightly pointed out, it's not the exact crystal
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* frequency that matters, only that all parts of the driver and
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* firmware are using the same value (close to the ideal value).
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*
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* Since I have a strong suspicion that, if the firmware ever assumes a
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* crystal value at all, it will assume 28.636360 MHz, the crystal
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* freq used in calculations in this driver will be:
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*
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* xtal_freq = 28.636360 MHz
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*
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* an error of less than 0.13 ppm which is way, way better than any off
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* the shelf crystal will have for accuracy anyway.
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*
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* Below I aim to run the PLLs' VCOs near 400 MHz to minimze errors.
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*
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* Many thanks to Jeff Campbell and Mike Bradley for their extensive
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* investigation, experimentation, testing, and suggested solutions of
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* of audio/video sync problems with SVideo and CVBS captures.
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*/
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/* the fast clock is at 200/245 MHz */
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/* 1 * xtal_freq * 0x0d.f7df9b8 / 2 = 200 MHz: 400 MHz pre post-divide*/
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/* 1 * xtal_freq * 0x11.1c71eb8 / 2 = 245 MHz: 490 MHz pre post-divide*/
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cx18_write_reg(cx, lowpwr ? 0xD : 0x11, CX18_FAST_CLOCK_PLL_INT);
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cx18_write_reg(cx, lowpwr ? 0x1EFBF37 : 0x038E3D7,
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CX18_FAST_CLOCK_PLL_FRAC);
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cx18_write_reg(cx, 2, CX18_FAST_CLOCK_PLL_POST);
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cx18_write_reg(cx, 1, CX18_FAST_CLOCK_PLL_PRESCALE);
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cx18_write_reg(cx, 4, CX18_FAST_CLOCK_PLL_ADJUST_BANDWIDTH);
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/* set slow clock to 125/120 MHz */
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/* xtal_freq * 0x0d.1861a20 / 3 = 125 MHz: 375 MHz before post-divide */
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/* xtal_freq * 0x0c.92493f8 / 3 = 120 MHz: 360 MHz before post-divide */
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cx18_write_reg(cx, lowpwr ? 0xD : 0xC, CX18_SLOW_CLOCK_PLL_INT);
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cx18_write_reg(cx, lowpwr ? 0x30C344 : 0x124927F,
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CX18_SLOW_CLOCK_PLL_FRAC);
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cx18_write_reg(cx, 3, CX18_SLOW_CLOCK_PLL_POST);
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/* mpeg clock pll 54MHz */
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/* xtal_freq * 0xf.15f17f0 / 8 = 54 MHz: 432 MHz before post-divide */
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cx18_write_reg(cx, 0xF, CX18_MPEG_CLOCK_PLL_INT);
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cx18_write_reg(cx, 0x2BE2FE, CX18_MPEG_CLOCK_PLL_FRAC);
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cx18_write_reg(cx, 8, CX18_MPEG_CLOCK_PLL_POST);
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/* Defaults */
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/* APU = SC or SC/2 = 125/62.5 */
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/* EPU = SC = 125 */
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/* DDR = FC = 180 */
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/* ENC = SC = 125 */
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/* AI1 = SC = 125 */
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/* VIM2 = disabled */
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/* PCI = FC/2 = 90 */
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/* AI2 = disabled */
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/* DEMUX = disabled */
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/* AO = SC/2 = 62.5 */
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/* SER = 54MHz */
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/* VFC = disabled */
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/* USB = disabled */
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if (lowpwr) {
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cx18_write_reg_expect(cx, 0xFFFF0020, CX18_CLOCK_SELECT1,
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0x00000020, 0xFFFFFFFF);
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cx18_write_reg_expect(cx, 0xFFFF0004, CX18_CLOCK_SELECT2,
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0x00000004, 0xFFFFFFFF);
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} else {
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/* This doesn't explicitly set every clock select */
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cx18_write_reg_expect(cx, 0x00060004, CX18_CLOCK_SELECT1,
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0x00000004, 0x00060006);
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cx18_write_reg_expect(cx, 0x00060006, CX18_CLOCK_SELECT2,
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0x00000006, 0x00060006);
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}
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cx18_write_reg_expect(cx, 0xFFFF0002, CX18_HALF_CLOCK_SELECT1,
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0x00000002, 0xFFFFFFFF);
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cx18_write_reg_expect(cx, 0xFFFF0104, CX18_HALF_CLOCK_SELECT2,
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0x00000104, 0xFFFFFFFF);
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cx18_write_reg_expect(cx, 0xFFFF9026, CX18_CLOCK_ENABLE1,
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0x00009026, 0xFFFFFFFF);
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cx18_write_reg_expect(cx, 0xFFFF3105, CX18_CLOCK_ENABLE2,
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0x00003105, 0xFFFFFFFF);
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}
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void cx18_init_memory(struct cx18 *cx)
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{
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cx18_msleep_timeout(10, 0);
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cx18_write_reg_expect(cx, 0x00010000, CX18_DDR_SOFT_RESET,
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0x00000000, 0x00010001);
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cx18_msleep_timeout(10, 0);
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cx18_write_reg(cx, cx->card->ddr.chip_config, CX18_DDR_CHIP_CONFIG);
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cx18_msleep_timeout(10, 0);
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cx18_write_reg(cx, cx->card->ddr.refresh, CX18_DDR_REFRESH);
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cx18_write_reg(cx, cx->card->ddr.timing1, CX18_DDR_TIMING1);
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cx18_write_reg(cx, cx->card->ddr.timing2, CX18_DDR_TIMING2);
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cx18_msleep_timeout(10, 0);
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/* Initialize DQS pad time */
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cx18_write_reg(cx, cx->card->ddr.tune_lane, CX18_DDR_TUNE_LANE);
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cx18_write_reg(cx, cx->card->ddr.initial_emrs, CX18_DDR_INITIAL_EMRS);
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cx18_msleep_timeout(10, 0);
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cx18_write_reg_expect(cx, 0x00020000, CX18_DDR_SOFT_RESET,
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0x00000000, 0x00020002);
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cx18_msleep_timeout(10, 0);
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/* use power-down mode when idle */
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cx18_write_reg(cx, 0x00000010, CX18_DDR_POWER_REG);
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cx18_write_reg_expect(cx, 0x00010001, CX18_REG_BUS_TIMEOUT_EN,
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0x00000001, 0x00010001);
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cx18_write_reg(cx, 0x48, CX18_DDR_MB_PER_ROW_7);
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cx18_write_reg(cx, 0xE0000, CX18_DDR_BASE_63_ADDR);
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cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT02); /* AO */
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cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT09); /* AI2 */
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cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT05); /* VIM1 */
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cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT06); /* AI1 */
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cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT07); /* 3D comb */
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cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT10); /* ME */
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cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT12); /* ENC */
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cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT13); /* PK */
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cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT11); /* RC */
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cx18_write_reg(cx, 0x00000101, CX18_WMB_CLIENT14); /* AVO */
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}
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#define CX18_CPU_FIRMWARE "v4l-cx23418-cpu.fw"
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#define CX18_APU_FIRMWARE "v4l-cx23418-apu.fw"
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int cx18_firmware_init(struct cx18 *cx)
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{
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u32 fw_entry_addr;
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int sz, retries;
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u32 api_args[MAX_MB_ARGUMENTS];
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/* Allow chip to control CLKRUN */
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cx18_write_reg(cx, 0x5, CX18_DSP0_INTERRUPT_MASK);
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/* Stop the firmware */
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cx18_write_reg_expect(cx, 0x000F000F, CX18_PROC_SOFT_RESET,
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0x0000000F, 0x000F000F);
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cx18_msleep_timeout(1, 0);
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/* If the CPU is still running */
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if ((cx18_read_reg(cx, CX18_PROC_SOFT_RESET) & 8) == 0) {
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CX18_ERR("%s: couldn't stop CPU to load firmware\n", __func__);
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return -EIO;
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}
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cx18_sw1_irq_enable(cx, IRQ_CPU_TO_EPU | IRQ_APU_TO_EPU);
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cx18_sw2_irq_enable(cx, IRQ_CPU_TO_EPU_ACK | IRQ_APU_TO_EPU_ACK);
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sz = load_cpu_fw_direct(CX18_CPU_FIRMWARE, cx->enc_mem, cx);
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if (sz <= 0)
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return sz;
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/* The SCB & IPC area *must* be correct before starting the firmwares */
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cx18_init_scb(cx);
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fw_entry_addr = 0;
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sz = load_apu_fw_direct(CX18_APU_FIRMWARE, cx->enc_mem, cx,
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&fw_entry_addr);
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if (sz <= 0)
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return sz;
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/* Start the CPU. The CPU will take care of the APU for us. */
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cx18_write_reg_expect(cx, 0x00080000, CX18_PROC_SOFT_RESET,
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0x00000000, 0x00080008);
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/* Wait up to 500 ms for the APU to come out of reset */
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for (retries = 0;
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retries < 50 && (cx18_read_reg(cx, CX18_PROC_SOFT_RESET) & 1) == 1;
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retries++)
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cx18_msleep_timeout(10, 0);
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cx18_msleep_timeout(200, 0);
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if (retries == 50 &&
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(cx18_read_reg(cx, CX18_PROC_SOFT_RESET) & 1) == 1) {
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CX18_ERR("Could not start the CPU\n");
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return -EIO;
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}
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/*
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* The CPU had once before set up to receive an interrupt for it's
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* outgoing IRQ_CPU_TO_EPU_ACK to us. If it ever does this, we get an
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* interrupt when it sends us an ack, but by the time we process it,
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* that flag in the SW2 status register has been cleared by the CPU
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* firmware. We'll prevent that not so useful condition from happening
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* by clearing the CPU's interrupt enables for Ack IRQ's we want to
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* process.
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*/
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cx18_sw2_irq_disable_cpu(cx, IRQ_CPU_TO_EPU_ACK | IRQ_APU_TO_EPU_ACK);
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/* Try a benign command to see if the CPU is alive and well */
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sz = cx18_vapi_result(cx, api_args, CX18_CPU_DEBUG_PEEK32, 1, 0);
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if (sz < 0)
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return sz;
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/* initialize GPIO */
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cx18_write_reg_expect(cx, 0x14001400, 0xc78110, 0x00001400, 0x14001400);
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return 0;
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}
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MODULE_FIRMWARE(CX18_CPU_FIRMWARE);
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MODULE_FIRMWARE(CX18_APU_FIRMWARE);
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