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path: root/drivers/media/video/cx18/cx18-firmware.c
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Diffstat (limited to 'drivers/media/video/cx18/cx18-firmware.c')
-rw-r--r--drivers/media/video/cx18/cx18-firmware.c229
1 files changed, 169 insertions, 60 deletions
diff --git a/drivers/media/video/cx18/cx18-firmware.c b/drivers/media/video/cx18/cx18-firmware.c
index 51534428cd00..1fa95da1575e 100644
--- a/drivers/media/video/cx18/cx18-firmware.c
+++ b/drivers/media/video/cx18/cx18-firmware.c
@@ -2,6 +2,7 @@
* cx18 firmware functions
*
* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
+ * Copyright (C) 2008 Andy Walls <awalls@radix.net>
*
* 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
@@ -25,6 +26,7 @@
#include "cx18-irq.h"
#include "cx18-firmware.h"
#include "cx18-cards.h"
+#include "cx18-av-core.h"
#include <linux/firmware.h>
#define CX18_PROC_SOFT_RESET 0xc70010
@@ -121,6 +123,7 @@ static int load_cpu_fw_direct(const char *fn, u8 __iomem *mem, struct cx18 *cx)
if (cx18_raw_readl(cx, dst) != *src) {
CX18_ERR("Mismatch at offset %x\n", i);
release_firmware(fw);
+ cx18_setup_page(cx, 0);
return -EIO;
}
dst++;
@@ -131,10 +134,12 @@ static int load_cpu_fw_direct(const char *fn, u8 __iomem *mem, struct cx18 *cx)
CX18_INFO("loaded %s firmware (%zd bytes)\n", fn, fw->size);
size = fw->size;
release_firmware(fw);
+ cx18_setup_page(cx, SCB_OFFSET);
return size;
}
-static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx)
+static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx,
+ u32 *entry_addr)
{
const struct firmware *fw = NULL;
int i, j;
@@ -149,9 +154,11 @@ static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx)
if (request_firmware(&fw, fn, &cx->dev->dev)) {
CX18_ERR("unable to open firmware %s\n", fn);
CX18_ERR("did you put the firmware in the hotplug firmware directory?\n");
+ cx18_setup_page(cx, 0);
return -ENOMEM;
}
+ *entry_addr = 0;
src = (const u32 *)fw->data;
vers = fw->data + sizeof(seghdr);
sz = fw->size;
@@ -168,10 +175,12 @@ static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx)
}
CX18_DEBUG_INFO("load segment %x-%x\n", seghdr.addr,
seghdr.addr + seghdr.size - 1);
+ if (*entry_addr == 0)
+ *entry_addr = seghdr.addr;
if (offset + seghdr.size > sz)
break;
for (i = 0; i < seghdr.size; i += 4096) {
- cx18_setup_page(cx, offset + i);
+ cx18_setup_page(cx, seghdr.addr + i);
for (j = i; j < seghdr.size && j < i + 4096; j += 4) {
/* no need for endianness conversion on the ppc */
cx18_raw_writel(cx, src[(offset + j) / 4],
@@ -181,6 +190,7 @@ static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx)
CX18_ERR("Mismatch at offset %x\n",
offset + j);
release_firmware(fw);
+ cx18_setup_page(cx, 0);
return -EIO;
}
}
@@ -192,16 +202,17 @@ static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx)
fn, apu_version, fw->size);
size = fw->size;
release_firmware(fw);
- /* Clear bit0 for APU to start from 0 */
- cx18_write_reg(cx, cx18_read_reg(cx, 0xc72030) & ~1, 0xc72030);
+ cx18_setup_page(cx, 0);
return size;
}
void cx18_halt_firmware(struct cx18 *cx)
{
CX18_DEBUG_INFO("Preparing for firmware halt.\n");
- cx18_write_reg(cx, 0x000F000F, CX18_PROC_SOFT_RESET); /* stop the fw */
- cx18_write_reg(cx, 0x00020002, CX18_ADEC_CONTROL);
+ cx18_write_reg_expect(cx, 0x000F000F, CX18_PROC_SOFT_RESET,
+ 0x0000000F, 0x000F000F);
+ cx18_write_reg_expect(cx, 0x00020002, CX18_ADEC_CONTROL,
+ 0x00000002, 0x00020002);
}
void cx18_init_power(struct cx18 *cx, int lowpwr)
@@ -211,9 +222,48 @@ void cx18_init_power(struct cx18 *cx, int lowpwr)
cx18_write_reg(cx, 0x00000008, CX18_PLL_POWER_DOWN);
/* ADEC out of sleep */
- cx18_write_reg(cx, 0x00020000, CX18_ADEC_CONTROL);
-
- /* The fast clock is at 200/245 MHz */
+ cx18_write_reg_expect(cx, 0x00020000, CX18_ADEC_CONTROL,
+ 0x00000000, 0x00020002);
+
+ /*
+ * The PLL parameters are based on the external crystal frequency that
+ * would ideally be:
+ *
+ * NTSC Color subcarrier freq * 8 =
+ * 4.5 MHz/286 * 455/2 * 8 = 28.63636363... MHz
+ *
+ * The accidents of history and rationale that explain from where this
+ * combination of magic numbers originate can be found in:
+ *
+ * [1] Abrahams, I. C., "Choice of Chrominance Subcarrier Frequency in
+ * the NTSC Standards", Proceedings of the I-R-E, January 1954, pp 79-80
+ *
+ * [2] Abrahams, I. C., "The 'Frequency Interleaving' Principle in the
+ * NTSC Standards", Proceedings of the I-R-E, January 1954, pp 81-83
+ *
+ * As Mike Bradley has rightly pointed out, it's not the exact crystal
+ * frequency that matters, only that all parts of the driver and
+ * firmware are using the same value (close to the ideal value).
+ *
+ * Since I have a strong suspicion that, if the firmware ever assumes a
+ * crystal value at all, it will assume 28.636360 MHz, the crystal
+ * freq used in calculations in this driver will be:
+ *
+ * xtal_freq = 28.636360 MHz
+ *
+ * an error of less than 0.13 ppm which is way, way better than any off
+ * the shelf crystal will have for accuracy anyway.
+ *
+ * Below I aim to run the PLLs' VCOs near 400 MHz to minimze errors.
+ *
+ * Many thanks to Jeff Campbell and Mike Bradley for their extensive
+ * investigation, experimentation, testing, and suggested solutions of
+ * of audio/video sync problems with SVideo and CVBS captures.
+ */
+
+ /* the fast clock is at 200/245 MHz */
+ /* 1 * xtal_freq * 0x0d.f7df9b8 / 2 = 200 MHz: 400 MHz pre post-divide*/
+ /* 1 * xtal_freq * 0x11.1c71eb8 / 2 = 245 MHz: 490 MHz pre post-divide*/
cx18_write_reg(cx, lowpwr ? 0xD : 0x11, CX18_FAST_CLOCK_PLL_INT);
cx18_write_reg(cx, lowpwr ? 0x1EFBF37 : 0x038E3D7,
CX18_FAST_CLOCK_PLL_FRAC);
@@ -223,16 +273,36 @@ void cx18_init_power(struct cx18 *cx, int lowpwr)
cx18_write_reg(cx, 4, CX18_FAST_CLOCK_PLL_ADJUST_BANDWIDTH);
/* set slow clock to 125/120 MHz */
- cx18_write_reg(cx, lowpwr ? 0x11 : 0x10, CX18_SLOW_CLOCK_PLL_INT);
- cx18_write_reg(cx, lowpwr ? 0xEBAF05 : 0x18618A8,
+ /* xtal_freq * 0x0d.1861a20 / 3 = 125 MHz: 375 MHz before post-divide */
+ /* xtal_freq * 0x0c.92493f8 / 3 = 120 MHz: 360 MHz before post-divide */
+ cx18_write_reg(cx, lowpwr ? 0xD : 0xC, CX18_SLOW_CLOCK_PLL_INT);
+ cx18_write_reg(cx, lowpwr ? 0x30C344 : 0x124927F,
CX18_SLOW_CLOCK_PLL_FRAC);
- cx18_write_reg(cx, 4, CX18_SLOW_CLOCK_PLL_POST);
+ cx18_write_reg(cx, 3, CX18_SLOW_CLOCK_PLL_POST);
/* mpeg clock pll 54MHz */
+ /* xtal_freq * 0xf.15f17f0 / 8 = 54 MHz: 432 MHz before post-divide */
cx18_write_reg(cx, 0xF, CX18_MPEG_CLOCK_PLL_INT);
- cx18_write_reg(cx, 0x2BCFEF, CX18_MPEG_CLOCK_PLL_FRAC);
+ cx18_write_reg(cx, 0x2BE2FE, CX18_MPEG_CLOCK_PLL_FRAC);
cx18_write_reg(cx, 8, CX18_MPEG_CLOCK_PLL_POST);
+ /*
+ * VDCLK Integer = 0x0f, Post Divider = 0x04
+ * AIMCLK Integer = 0x0e, Post Divider = 0x16
+ */
+ cx18_av_write4(cx, CXADEC_PLL_CTRL1, 0x160e040f);
+
+ /* VDCLK Fraction = 0x2be2fe */
+ /* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz before post divide */
+ cx18_av_write4(cx, CXADEC_VID_PLL_FRAC, 0x002be2fe);
+
+ /* AIMCLK Fraction = 0x05227ad */
+ /* xtal * 0xe.2913d68/0x16 = 48000 * 384: 406 MHz before post-divide */
+ cx18_av_write4(cx, CXADEC_AUX_PLL_FRAC, 0x005227ad);
+
+ /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x16 */
+ cx18_av_write(cx, CXADEC_I2S_MCLK, 0x56);
+
/* Defaults */
/* APU = SC or SC/2 = 125/62.5 */
/* EPU = SC = 125 */
@@ -248,22 +318,34 @@ void cx18_init_power(struct cx18 *cx, int lowpwr)
/* VFC = disabled */
/* USB = disabled */
- cx18_write_reg(cx, lowpwr ? 0xFFFF0020 : 0x00060004,
- CX18_CLOCK_SELECT1);
- cx18_write_reg(cx, lowpwr ? 0xFFFF0004 : 0x00060006,
- CX18_CLOCK_SELECT2);
-
- cx18_write_reg(cx, 0xFFFF0002, CX18_HALF_CLOCK_SELECT1);
- cx18_write_reg(cx, 0xFFFF0104, CX18_HALF_CLOCK_SELECT2);
+ if (lowpwr) {
+ cx18_write_reg_expect(cx, 0xFFFF0020, CX18_CLOCK_SELECT1,
+ 0x00000020, 0xFFFFFFFF);
+ cx18_write_reg_expect(cx, 0xFFFF0004, CX18_CLOCK_SELECT2,
+ 0x00000004, 0xFFFFFFFF);
+ } else {
+ /* This doesn't explicitly set every clock select */
+ cx18_write_reg_expect(cx, 0x00060004, CX18_CLOCK_SELECT1,
+ 0x00000004, 0x00060006);
+ cx18_write_reg_expect(cx, 0x00060006, CX18_CLOCK_SELECT2,
+ 0x00000006, 0x00060006);
+ }
- cx18_write_reg(cx, 0xFFFF9026, CX18_CLOCK_ENABLE1);
- cx18_write_reg(cx, 0xFFFF3105, CX18_CLOCK_ENABLE2);
+ cx18_write_reg_expect(cx, 0xFFFF0002, CX18_HALF_CLOCK_SELECT1,
+ 0x00000002, 0xFFFFFFFF);
+ cx18_write_reg_expect(cx, 0xFFFF0104, CX18_HALF_CLOCK_SELECT2,
+ 0x00000104, 0xFFFFFFFF);
+ cx18_write_reg_expect(cx, 0xFFFF9026, CX18_CLOCK_ENABLE1,
+ 0x00009026, 0xFFFFFFFF);
+ cx18_write_reg_expect(cx, 0xFFFF3105, CX18_CLOCK_ENABLE2,
+ 0x00003105, 0xFFFFFFFF);
}
void cx18_init_memory(struct cx18 *cx)
{
cx18_msleep_timeout(10, 0);
- cx18_write_reg(cx, 0x10000, CX18_DDR_SOFT_RESET);
+ cx18_write_reg_expect(cx, 0x00010000, CX18_DDR_SOFT_RESET,
+ 0x00000000, 0x00010001);
cx18_msleep_timeout(10, 0);
cx18_write_reg(cx, cx->card->ddr.chip_config, CX18_DDR_CHIP_CONFIG);
@@ -282,13 +364,15 @@ void cx18_init_memory(struct cx18 *cx)
cx18_msleep_timeout(10, 0);
- cx18_write_reg(cx, 0x20000, CX18_DDR_SOFT_RESET);
+ cx18_write_reg_expect(cx, 0x00020000, CX18_DDR_SOFT_RESET,
+ 0x00000000, 0x00020002);
cx18_msleep_timeout(10, 0);
/* use power-down mode when idle */
cx18_write_reg(cx, 0x00000010, CX18_DDR_POWER_REG);
- cx18_write_reg(cx, 0x10001, CX18_REG_BUS_TIMEOUT_EN);
+ cx18_write_reg_expect(cx, 0x00010001, CX18_REG_BUS_TIMEOUT_EN,
+ 0x00000001, 0x00010001);
cx18_write_reg(cx, 0x48, CX18_DDR_MB_PER_ROW_7);
cx18_write_reg(cx, 0xE0000, CX18_DDR_BASE_63_ADDR);
@@ -307,51 +391,76 @@ void cx18_init_memory(struct cx18 *cx)
int cx18_firmware_init(struct cx18 *cx)
{
+ u32 fw_entry_addr;
+ int sz, retries;
+ u32 api_args[MAX_MB_ARGUMENTS];
+
/* Allow chip to control CLKRUN */
cx18_write_reg(cx, 0x5, CX18_DSP0_INTERRUPT_MASK);
- cx18_write_reg(cx, 0x000F000F, CX18_PROC_SOFT_RESET); /* stop the fw */
+ /* Stop the firmware */
+ cx18_write_reg_expect(cx, 0x000F000F, CX18_PROC_SOFT_RESET,
+ 0x0000000F, 0x000F000F);
cx18_msleep_timeout(1, 0);
+ /* If the CPU is still running */
+ if ((cx18_read_reg(cx, CX18_PROC_SOFT_RESET) & 8) == 0) {
+ CX18_ERR("%s: couldn't stop CPU to load firmware\n", __func__);
+ return -EIO;
+ }
+
cx18_sw1_irq_enable(cx, IRQ_CPU_TO_EPU | IRQ_APU_TO_EPU);
cx18_sw2_irq_enable(cx, IRQ_CPU_TO_EPU_ACK | IRQ_APU_TO_EPU_ACK);
- /* Only if the processor is not running */
- if (cx18_read_reg(cx, CX18_PROC_SOFT_RESET) & 8) {
- int sz = load_apu_fw_direct("v4l-cx23418-apu.fw",
- cx->enc_mem, cx);
-
- cx18_write_enc(cx, 0xE51FF004, 0);
- cx18_write_enc(cx, 0xa00000, 4); /* todo: not hardcoded */
- /* Start APU */
- cx18_write_reg(cx, 0x00010000, CX18_PROC_SOFT_RESET);
- cx18_msleep_timeout(500, 0);
-
- sz = sz <= 0 ? sz : load_cpu_fw_direct("v4l-cx23418-cpu.fw",
- cx->enc_mem, cx);
-
- if (sz > 0) {
- int retries = 0;
-
- /* start the CPU */
- cx18_write_reg(cx, 0x00080000, CX18_PROC_SOFT_RESET);
- while (retries++ < 50) { /* Loop for max 500mS */
- if ((cx18_read_reg(cx, CX18_PROC_SOFT_RESET)
- & 1) == 0)
- break;
- cx18_msleep_timeout(10, 0);
- }
- cx18_msleep_timeout(200, 0);
- if (retries == 51) {
- CX18_ERR("Could not start the CPU\n");
- return -EIO;
- }
- }
- if (sz <= 0)
- return -EIO;
+ sz = load_cpu_fw_direct("v4l-cx23418-cpu.fw", cx->enc_mem, cx);
+ if (sz <= 0)
+ return sz;
+
+ /* The SCB & IPC area *must* be correct before starting the firmwares */
+ cx18_init_scb(cx);
+
+ fw_entry_addr = 0;
+ sz = load_apu_fw_direct("v4l-cx23418-apu.fw", cx->enc_mem, cx,
+ &fw_entry_addr);
+ if (sz <= 0)
+ return sz;
+
+ /* Start the CPU. The CPU will take care of the APU for us. */
+ cx18_write_reg_expect(cx, 0x00080000, CX18_PROC_SOFT_RESET,
+ 0x00000000, 0x00080008);
+
+ /* Wait up to 500 ms for the APU to come out of reset */
+ for (retries = 0;
+ retries < 50 && (cx18_read_reg(cx, CX18_PROC_SOFT_RESET) & 1) == 1;
+ retries++)
+ cx18_msleep_timeout(10, 0);
+
+ cx18_msleep_timeout(200, 0);
+
+ if (retries == 50 &&
+ (cx18_read_reg(cx, CX18_PROC_SOFT_RESET) & 1) == 1) {
+ CX18_ERR("Could not start the CPU\n");
+ return -EIO;
}
+
+ /*
+ * The CPU had once before set up to receive an interrupt for it's
+ * outgoing IRQ_CPU_TO_EPU_ACK to us. If it ever does this, we get an
+ * interrupt when it sends us an ack, but by the time we process it,
+ * that flag in the SW2 status register has been cleared by the CPU
+ * firmware. We'll prevent that not so useful condition from happening
+ * by clearing the CPU's interrupt enables for Ack IRQ's we want to
+ * process.
+ */
+ cx18_sw2_irq_disable_cpu(cx, IRQ_CPU_TO_EPU_ACK | IRQ_APU_TO_EPU_ACK);
+
+ /* Try a benign command to see if the CPU is alive and well */
+ sz = cx18_vapi_result(cx, api_args, CX18_CPU_DEBUG_PEEK32, 1, 0);
+ if (sz < 0)
+ return sz;
+
/* initialize GPIO */
- cx18_write_reg(cx, 0x14001400, 0xC78110);
+ cx18_write_reg_expect(cx, 0x14001400, 0xc78110, 0x00001400, 0x14001400);
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.