mirror of
https://github.com/openwrt/openwrt.git
synced 2024-11-28 20:34:53 +08:00
realtek: add RTL83XX clock driver
Add a new self-contained combined clock & platform driver that allows to
access the PLL hardware clocks of RTL83XX devices. Currently it provides
info about CPU, MEM and LXB clocks on RTL838X and RTL839X devices and
additionally allows to change the CPU clocks. Changing the clocks
multiple times on a DGS-1210-20 and a DGS-1210-52 already works well and
is multithreading safe on the RTL839X. Even a cpufreq initiated change
of the CPU clock works fine. Loading the driver will add some meaningful
logging.
[0.000000] rtl83xx-clk: initialized, CPU 500 MHz, MEM 300 MHz (8 Bit DDR3), LXB 200 MHz
[0.279456] rtl83xx-clk soc:clock-controller: rate setting enabled, CPU 325-600 MHz,
MEM 300-300 MHz, LXB 200-200 MHz, OVERCLOCK AT OWN RISK
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
[remove trailing whitespaces, C-style SPDX comments for ASM and headers]
Signed-off-by: Sander Vanheule <sander@svanheule.net>
This commit is contained in:
Markus Stockhausen
Sander Vanheule
parent
1efaad03bb
commit
4850bd887c
19
target/linux/realtek/files-5.10/drivers/clk/realtek/Kconfig
Normal file
19
target/linux/realtek/files-5.10/drivers/clk/realtek/Kconfig
Normal file
@ -0,0 +1,19 @@
|
||||
# SPDX-License-Identifier: GPL-2.0-only
|
||||
|
||||
menuconfig COMMON_CLK_REALTEK
|
||||
bool "Support for Realtek's clock controllers"
|
||||
depends on RTL83XX
|
||||
|
||||
if COMMON_CLK_REALTEK
|
||||
|
||||
config COMMON_CLK_RTL83XX
|
||||
bool "Clock driver for Realtek RTL83XX"
|
||||
depends on RTL83XX
|
||||
select SRAM
|
||||
help
|
||||
This driver adds support for the Realtek RTL83xx series basic clocks.
|
||||
This includes chips in the RTL838x series, such as RTL8380, RTL8381,
|
||||
RTL832, as well as chips from the RTL839x series, such as RTL8390,
|
||||
RT8391, RTL8392, RTL8393 and RTL8396.
|
||||
|
||||
endif
|
||||
@ -0,0 +1,2 @@
|
||||
# SPDX-License-Identifier: GPL-2.0-only
|
||||
obj-$(CONFIG_COMMON_CLK_RTL83XX) += clk-rtl83xx.o clk-rtl838x-sram.o clk-rtl839x-sram.o
|
||||
@ -0,0 +1,150 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0-only */
|
||||
/*
|
||||
* Realtek RTL838X SRAM clock setters
|
||||
* Copyright (C) 2022 Markus Stockhausen <markus.stockhausen@gmx.de>
|
||||
*/
|
||||
|
||||
#include <dt-bindings/clock/rtl83xx-clk.h>
|
||||
|
||||
#include "clk-rtl83xx.h"
|
||||
|
||||
#define rGLB $t0
|
||||
#define rCTR $t1
|
||||
#define rMSK $t2
|
||||
#define rSLP $t3
|
||||
#define rTMP $t4
|
||||
|
||||
.set noreorder
|
||||
|
||||
.globl rtcl_838x_dram_start
|
||||
rtcl_838x_dram_start:
|
||||
|
||||
/*
|
||||
* Functions start here and should avoid access to normal memory. REMARK! Do not forget about
|
||||
* stack pointer and dirty caches that might interfere.
|
||||
*/
|
||||
|
||||
.globl rtcl_838x_dram_set_rate
|
||||
.ent rtcl_838x_dram_set_rate
|
||||
rtcl_838x_dram_set_rate:
|
||||
|
||||
#ifdef CONFIG_RTL838X
|
||||
|
||||
li rCTR, RTL_SW_CORE_BASE
|
||||
addiu rGLB, rCTR, RTL838X_PLL_GLB_CTRL
|
||||
ori rTMP, $0, CLK_CPU
|
||||
beq $a0, rTMP, pre_cpu
|
||||
ori rTMP, $0, CLK_MEM
|
||||
beq $a0, rTMP, pre_mem
|
||||
nop
|
||||
pre_lxb:
|
||||
ori rSLP, $0, RTL838X_GLB_CTRL_LXB_PLL_READY_MASK
|
||||
addiu rCTR, rCTR, RTL838X_PLL_LXB_CTRL0
|
||||
b main_set
|
||||
ori rMSK, $0, RTL838X_GLB_CTRL_EN_LXB_PLL_MASK
|
||||
pre_mem:
|
||||
/* simple 64K data cache flush to avoid unexpected memory access */
|
||||
li rMSK, RTL_SRAM_BASE
|
||||
li rTMP, 2048
|
||||
pre_flush:
|
||||
lw $0, 0(rMSK)
|
||||
addiu rMSK, rMSK, 32
|
||||
addiu rTMP, rTMP, -1
|
||||
bne rTMP, $0, pre_flush
|
||||
lw $0, -4(rMSK)
|
||||
|
||||
ori rSLP, $0, RTL838X_GLB_CTRL_MEM_PLL_READY_MASK
|
||||
addiu rCTR, rCTR, RTL838X_PLL_MEM_CTRL0
|
||||
b main_set
|
||||
ori rMSK, $0, RTL838X_GLB_CTRL_EN_MEM_PLL_MASK
|
||||
pre_cpu:
|
||||
/* switch CPU to LXB clock */
|
||||
ori rMSK, $0, RTL838X_GLB_CTRL_CPU_PLL_SC_MUX_MASK
|
||||
nor rMSK, rMSK, $0
|
||||
sync
|
||||
lw rTMP, 0(rGLB)
|
||||
and rTMP, rTMP, rMSK
|
||||
sw rTMP, 0(rGLB)
|
||||
sync
|
||||
|
||||
ori rSLP, $0, RTL838X_GLB_CTRL_CPU_PLL_READY_MASK
|
||||
addiu rCTR, rCTR, RTL838X_PLL_CPU_CTRL0
|
||||
ori rMSK, $0, RTL838X_GLB_CTRL_EN_CPU_PLL_MASK
|
||||
main_set:
|
||||
/* disable PLL */
|
||||
nor rMSK, rMSK, 0
|
||||
sync
|
||||
lw rTMP, 0(rGLB)
|
||||
sync
|
||||
and rTMP, rTMP, rMSK
|
||||
sync
|
||||
sw rTMP, 0(rGLB)
|
||||
|
||||
/* set new PLL values */
|
||||
sync
|
||||
sw $a1, 0(rCTR)
|
||||
sw $a2, 4(rCTR)
|
||||
sync
|
||||
|
||||
/* enable PLL (will reset it and clear ready status) */
|
||||
nor rMSK, rMSK, 0
|
||||
sync
|
||||
lw rTMP, 0(rGLB)
|
||||
sync
|
||||
or rTMP, rTMP, rMSK
|
||||
sync
|
||||
sw rTMP, 0(rGLB)
|
||||
|
||||
/* wait for PLL to become ready */
|
||||
wait_ready:
|
||||
lw rTMP, 0(rGLB)
|
||||
and rTMP, rTMP, rSLP
|
||||
bne rTMP, $0, wait_ready
|
||||
sync
|
||||
|
||||
/* branch to post processing */
|
||||
ori rTMP, $0, CLK_CPU
|
||||
beq $a0, rTMP, post_cpu
|
||||
ori rTMP, $0, CLK_MEM
|
||||
beq $a0, rTMP, post_mem
|
||||
nop
|
||||
post_lxb:
|
||||
jr $ra
|
||||
nop
|
||||
post_mem:
|
||||
jr $ra
|
||||
nop
|
||||
post_cpu:
|
||||
/* stabilize clock to avoid crash, empirically determined */
|
||||
ori rSLP, $0, 0x3000
|
||||
wait_cpu:
|
||||
bnez rSLP, wait_cpu
|
||||
addiu rSLP, rSLP, -1
|
||||
|
||||
/* switch CPU to PLL clock */
|
||||
ori rMSK, $0, RTL838X_GLB_CTRL_CPU_PLL_SC_MUX_MASK
|
||||
sync
|
||||
lw rTMP, 0(rGLB)
|
||||
or rTMP, rTMP, rMSK
|
||||
sw rTMP, 0(rGLB)
|
||||
sync
|
||||
jr $ra
|
||||
nop
|
||||
|
||||
#else /* !CONFIG_RTL838X */
|
||||
|
||||
jr $ra
|
||||
nop
|
||||
|
||||
#endif
|
||||
|
||||
.end rtcl_838x_dram_set_rate
|
||||
|
||||
/*
|
||||
* End marker. Do not delete.
|
||||
*/
|
||||
.word RTL_SRAM_MARKER
|
||||
.globl rtcl_838x_dram_size
|
||||
rtcl_838x_dram_size:
|
||||
.word .-rtcl_838x_dram_start
|
||||
|
||||
@ -0,0 +1,142 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0-only */
|
||||
/*
|
||||
* Realtek RTL839X SRAM clock setters
|
||||
* Copyright (C) 2022 Markus Stockhausen <markus.stockhausen@gmx.de>
|
||||
*/
|
||||
|
||||
#include <asm/mipsregs.h>
|
||||
#include <dt-bindings/clock/rtl83xx-clk.h>
|
||||
|
||||
#include "clk-rtl83xx.h"
|
||||
|
||||
#define rGLB $t0
|
||||
#define rCTR $t1
|
||||
#define rMSK $t2
|
||||
#define rSLP1 $t3
|
||||
#define rSLP2 $t4
|
||||
#define rSLP3 $t5
|
||||
#define rTMP $t6
|
||||
#define rCP0 $t7
|
||||
|
||||
.set noreorder
|
||||
|
||||
.globl rtcl_839x_dram_start
|
||||
rtcl_839x_dram_start:
|
||||
|
||||
/*
|
||||
* Functions start here and should avoid access to normal memory. REMARK! Do not forget about
|
||||
* stack pointer and dirty caches that might interfere.
|
||||
*/
|
||||
|
||||
.globl rtcl_839x_dram_set_rate
|
||||
.ent rtcl_839x_dram_set_rate
|
||||
rtcl_839x_dram_set_rate:
|
||||
|
||||
#ifdef CONFIG_RTL839X
|
||||
|
||||
/* disable MIPS 34K branch and return prediction */
|
||||
mfc0 rCP0, CP0_CONFIG, 7
|
||||
ori rTMP, rCP0, 0xc
|
||||
mtc0 rTMP, CP0_CONFIG, 7
|
||||
|
||||
li rCTR, RTL_SW_CORE_BASE
|
||||
addiu rGLB, rCTR, RTL839X_PLL_GLB_CTRL
|
||||
ori rTMP, $0, CLK_CPU
|
||||
beq $a0, rTMP, pre_cpu
|
||||
ori rTMP, $0, CLK_MEM
|
||||
beq $a0, rTMP, pre_mem
|
||||
nop
|
||||
pre_lxb:
|
||||
li rSLP1, 0x400000
|
||||
li rSLP2, 0x400000
|
||||
li rSLP3, 0x400000
|
||||
addiu rCTR, rCTR, RTL839X_PLL_LXB_CTRL0
|
||||
b main_set
|
||||
ori rMSK, $0, RTL839X_GLB_CTRL_LXB_CLKSEL_MASK
|
||||
pre_mem:
|
||||
/* try to avoid memory access with simple 64K data cache flush */
|
||||
li rMSK, RTL_SRAM_BASE
|
||||
li rTMP, 2048
|
||||
pre_flush:
|
||||
lw $0, 0(rMSK)
|
||||
addiu rMSK, rMSK, 32
|
||||
addiu rTMP, rTMP, -1
|
||||
bne rTMP, $0, pre_flush
|
||||
lw $0, -4(rMSK)
|
||||
|
||||
li rSLP1, 0x10000
|
||||
li rSLP2, 0x10000
|
||||
li rSLP3, 0x10000
|
||||
addiu rCTR, rCTR, RTL839X_PLL_MEM_CTRL0
|
||||
b main_set
|
||||
ori rMSK, $0, RTL839X_GLB_CTRL_MEM_CLKSEL_MASK
|
||||
pre_cpu:
|
||||
li rSLP1, 0x1000
|
||||
li rSLP2, 0x1000
|
||||
li rSLP3, 0x200
|
||||
addiu rCTR, rCTR, RTL839X_PLL_CPU_CTRL0
|
||||
ori rMSK, $0, RTL839X_GLB_CTRL_CPU_CLKSEL_MASK
|
||||
main_set:
|
||||
/* switch to fixed clock */
|
||||
sync
|
||||
lw rTMP, 0(rGLB)
|
||||
sync
|
||||
or rTMP, rTMP, rMSK
|
||||
sync
|
||||
sw rTMP, 0(rGLB)
|
||||
|
||||
/* wait until fixed clock in use */
|
||||
or rTMP, rSLP1, $0
|
||||
wait_fixclock:
|
||||
bnez rTMP, wait_fixclock
|
||||
addiu rTMP, rTMP, -1
|
||||
|
||||
/* set new PLL values */
|
||||
sync
|
||||
sw $a1, 0(rCTR)
|
||||
sw $a2, 4(rCTR)
|
||||
sync
|
||||
|
||||
/* wait for value takeover */
|
||||
or rTMP, rSLP2, $0
|
||||
wait_pll:
|
||||
bnez rTMP, wait_pll
|
||||
addiu rTMP, rTMP, -1
|
||||
|
||||
/* switch back to PLL clock*/
|
||||
nor rMSK, rMSK, $0
|
||||
sync
|
||||
lw rTMP, 0(rGLB)
|
||||
sync
|
||||
and rTMP, rTMP, rMSK
|
||||
sync
|
||||
sw rTMP, 0(rGLB)
|
||||
|
||||
/* wait until PLL clock in use */
|
||||
or rTMP, rSLP3, $0
|
||||
wait_pllclock:
|
||||
bnez rTMP, wait_pllclock
|
||||
addiu rTMP, rTMP, -1
|
||||
|
||||
/* restore branch prediction */
|
||||
mtc0 rCP0, CP0_CONFIG, 7
|
||||
jr $ra
|
||||
nop
|
||||
|
||||
#else /* !CONFIG_RTL839X */
|
||||
|
||||
jr $ra
|
||||
nop
|
||||
|
||||
#endif
|
||||
|
||||
.end rtcl_839x_dram_set_rate
|
||||
|
||||
/*
|
||||
* End marker. Do not delete.
|
||||
*/
|
||||
.word RTL_SRAM_MARKER
|
||||
.globl rtcl_839x_dram_size
|
||||
rtcl_839x_dram_size:
|
||||
.word .-rtcl_839x_dram_start
|
||||
|
||||
@ -0,0 +1,763 @@
|
||||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* Realtek RTL83XX clock driver
|
||||
* Copyright (C) 2022 Markus Stockhausen <markus.stockhausen@gmx.de>
|
||||
*
|
||||
* This driver provides basic clock support for the central core clock unit (CCU) and its PLLs
|
||||
* inside the RTL838X and RTL8389X SOC. Currently CPU, memory and LXB clock information can be
|
||||
* accessed. To make use of the driver add the following devices and configurations at the
|
||||
* appropriate locations to the DT.
|
||||
*
|
||||
* #include <dt-bindings/clock/rtl83xx-clk.h>
|
||||
*
|
||||
* sram0: sram@9f000000 {
|
||||
* compatible = "mmio-sram";
|
||||
* reg = <0x9f000000 0x18000>;
|
||||
* #address-cells = <1>;
|
||||
* #size-cells = <1>;
|
||||
* ranges = <0 0x9f000000 0x18000>;
|
||||
* };
|
||||
*
|
||||
* osc: oscillator {
|
||||
* compatible = "fixed-clock";
|
||||
* #clock-cells = <0>;
|
||||
* clock-frequency = <25000000>;
|
||||
* };
|
||||
*
|
||||
* ccu: clock-controller {
|
||||
* compatible = "realtek,rtl8380-clock";
|
||||
* #clock-cells = <1>;
|
||||
* clocks = <&osc>;
|
||||
* clock-names = "ref_clk";
|
||||
* };
|
||||
*
|
||||
*
|
||||
* The SRAM part is needed to be able to set clocks. When changing clocks the code must not run
|
||||
* from DRAM. Otherwise system might freeze. Take care to adjust CCU compatibility, SRAM address
|
||||
* and size to the target SOC device. Afterwards one can access/identify the clocks in the other
|
||||
* DT devices with <&ccu CLK_CPU>, <&ccu CLK_MEM> or <&ccu CLK_LXB>. Additionally the clocks can
|
||||
* be used inside the kernel with
|
||||
*
|
||||
* cpu_clk = clk_get(NULL, "cpu_clk");
|
||||
* mem_clk = clk_get(NULL, "mem_clk");
|
||||
* lxb_clk = clk_get(NULL, "lxb_clk");
|
||||
*
|
||||
* This driver can be directly used by the DT based cpufreq driver (CONFIG_CPUFREQ_DT) if CPU
|
||||
* references the right clock and sane operating points (OPP) are provided. E.g.
|
||||
*
|
||||
* cpu@0 {
|
||||
* compatible = "mips,mips4KEc";
|
||||
* reg = <0>;
|
||||
* clocks = <&ccu CLK_CPU>;
|
||||
* operating-points-v2 = <&cpu_opp_table>;
|
||||
* };
|
||||
*
|
||||
* cpu_opp_table: opp-table-0 {
|
||||
* compatible = "operating-points-v2";
|
||||
* opp-shared;
|
||||
* opp00 {
|
||||
* opp-hz = /bits/ 64 <425000000>;
|
||||
* };
|
||||
* ...
|
||||
* }
|
||||
*/
|
||||
|
||||
#include <asm/cacheflush.h>
|
||||
#include <asm/mipsmtregs.h>
|
||||
#include <dt-bindings/clock/rtl83xx-clk.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/clk-provider.h>
|
||||
#include <linux/clkdev.h>
|
||||
#include <linux/cpu.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/genalloc.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/ioport.h>
|
||||
#include <linux/of_address.h>
|
||||
#include <linux/of_platform.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
#include "clk-rtl83xx.h"
|
||||
|
||||
#define read_sw(reg) ioread32(((void *)RTL_SW_CORE_BASE) + reg)
|
||||
#define read_soc(reg) ioread32(((void *)RTL_SOC_BASE) + reg)
|
||||
|
||||
#define write_sw(val, reg) iowrite32(val, ((void *)RTL_SW_CORE_BASE) + reg)
|
||||
#define write_soc(val, reg) iowrite32(val, ((void *)RTL_SOC_BASE) + reg)
|
||||
|
||||
/*
|
||||
* some hardware specific definitions
|
||||
*/
|
||||
|
||||
#define SOC_RTL838X 0
|
||||
#define SOC_RTL839X 1
|
||||
#define SOC_COUNT 2
|
||||
|
||||
#define MEM_DDR1 1
|
||||
#define MEM_DDR2 2
|
||||
#define MEM_DDR3 3
|
||||
|
||||
#define REG_CTRL0 0
|
||||
#define REG_CTRL1 1
|
||||
#define REG_COUNT 2
|
||||
|
||||
#define OSC_RATE 25000000
|
||||
|
||||
static const int rtcl_regs[SOC_COUNT][REG_COUNT][CLK_COUNT] = {
|
||||
{
|
||||
{ RTL838X_PLL_CPU_CTRL0, RTL838X_PLL_MEM_CTRL0, RTL838X_PLL_LXB_CTRL0 },
|
||||
{ RTL838X_PLL_CPU_CTRL1, RTL838X_PLL_MEM_CTRL1, RTL838X_PLL_LXB_CTRL1 },
|
||||
}, {
|
||||
{ RTL839X_PLL_CPU_CTRL0, RTL839X_PLL_MEM_CTRL0, RTL839X_PLL_LXB_CTRL0 },
|
||||
{ RTL839X_PLL_CPU_CTRL1, RTL839X_PLL_MEM_CTRL1, RTL839X_PLL_LXB_CTRL1 },
|
||||
}
|
||||
};
|
||||
|
||||
#define RTCL_REG_SET(_rate, _ctrl0, _ctrl1) \
|
||||
{ \
|
||||
.rate = _rate, \
|
||||
.ctrl0 = _ctrl0, \
|
||||
.ctrl1 = _ctrl1, \
|
||||
}
|
||||
|
||||
struct rtcl_reg_set {
|
||||
unsigned int rate;
|
||||
unsigned int ctrl0;
|
||||
unsigned int ctrl1;
|
||||
};
|
||||
|
||||
/*
|
||||
* The following configuration tables are valid operation points for their corresponding PLLs.
|
||||
* The magic numbers are precalculated mulitpliers and dividers to keep the driver simple. They
|
||||
* also provide rates outside the allowed physical specifications. E.g. DDR3 memory has a lower
|
||||
* limit of 303 MHz or the CPU might get unstable if set to anything above its startup frequency.
|
||||
* Additionally the Realtek SOCs tend to expect CPU speed > MEM speed > LXB speed. The caller or
|
||||
* DT configuration must take care that only valid operating points are selected.
|
||||
*/
|
||||
|
||||
static const struct rtcl_reg_set rtcl_838x_cpu_reg_set[] = {
|
||||
RTCL_REG_SET(300000000, 0x045c8, 0x1414530e),
|
||||
RTCL_REG_SET(325000000, 0x04648, 0x1414530e),
|
||||
RTCL_REG_SET(350000000, 0x046c8, 0x1414530e),
|
||||
RTCL_REG_SET(375000000, 0x04748, 0x1414530e),
|
||||
RTCL_REG_SET(400000000, 0x045c8, 0x0c14530e),
|
||||
RTCL_REG_SET(425000000, 0x04628, 0x0c14530e),
|
||||
RTCL_REG_SET(450000000, 0x04688, 0x0c14530e),
|
||||
RTCL_REG_SET(475000000, 0x046e8, 0x0c14530e),
|
||||
RTCL_REG_SET(500000000, 0x04748, 0x0c14530e),
|
||||
RTCL_REG_SET(525000000, 0x047a8, 0x0c14530e),
|
||||
RTCL_REG_SET(550000000, 0x04808, 0x0c14530e),
|
||||
RTCL_REG_SET(575000000, 0x04868, 0x0c14530e),
|
||||
RTCL_REG_SET(600000000, 0x048c8, 0x0c14530e),
|
||||
RTCL_REG_SET(625000000, 0x04928, 0x0c14530e)
|
||||
};
|
||||
|
||||
static const struct rtcl_reg_set rtcl_838x_mem_reg_set[] = {
|
||||
RTCL_REG_SET(200000000, 0x041bc, 0x14018C80),
|
||||
RTCL_REG_SET(225000000, 0x0417c, 0x0c018C80),
|
||||
RTCL_REG_SET(250000000, 0x041ac, 0x0c018C80),
|
||||
RTCL_REG_SET(275000000, 0x0412c, 0x04018C80),
|
||||
RTCL_REG_SET(300000000, 0x0414c, 0x04018c80),
|
||||
RTCL_REG_SET(325000000, 0x0416c, 0x04018c80),
|
||||
RTCL_REG_SET(350000000, 0x0418c, 0x04018c80),
|
||||
RTCL_REG_SET(375000000, 0x041ac, 0x04018c80)
|
||||
};
|
||||
|
||||
static const struct rtcl_reg_set rtcl_838x_lxb_reg_set[] = {
|
||||
RTCL_REG_SET(100000000, 0x043c8, 0x001ad30e),
|
||||
RTCL_REG_SET(125000000, 0x043c8, 0x001ad30e),
|
||||
RTCL_REG_SET(150000000, 0x04508, 0x1c1ad30e),
|
||||
RTCL_REG_SET(175000000, 0x04508, 0x1c1ad30e),
|
||||
RTCL_REG_SET(200000000, 0x047c8, 0x001ad30e)
|
||||
};
|
||||
|
||||
static const struct rtcl_reg_set rtcl_839x_cpu_reg_set[] = {
|
||||
RTCL_REG_SET(400000000, 0x0414c, 0x00000005),
|
||||
RTCL_REG_SET(425000000, 0x041ec, 0x00000006),
|
||||
RTCL_REG_SET(450000000, 0x0417c, 0x00000005),
|
||||
RTCL_REG_SET(475000000, 0x0422c, 0x00000006),
|
||||
RTCL_REG_SET(500000000, 0x041ac, 0x00000005),
|
||||
RTCL_REG_SET(525000000, 0x0426c, 0x00000006),
|
||||
RTCL_REG_SET(550000000, 0x0412c, 0x00000004),
|
||||
RTCL_REG_SET(575000000, 0x042ac, 0x00000006),
|
||||
RTCL_REG_SET(600000000, 0x0414c, 0x00000004),
|
||||
RTCL_REG_SET(625000000, 0x042ec, 0x00000006),
|
||||
RTCL_REG_SET(650000000, 0x0416c, 0x00000004),
|
||||
RTCL_REG_SET(675000000, 0x04324, 0x00000006),
|
||||
RTCL_REG_SET(700000000, 0x0418c, 0x00000004),
|
||||
RTCL_REG_SET(725000000, 0x0436c, 0x00000006),
|
||||
RTCL_REG_SET(750000000, 0x0438c, 0x00000006),
|
||||
RTCL_REG_SET(775000000, 0x043ac, 0x00000006),
|
||||
RTCL_REG_SET(800000000, 0x043cc, 0x00000006),
|
||||
RTCL_REG_SET(825000000, 0x043ec, 0x00000006),
|
||||
RTCL_REG_SET(850000000, 0x0440c, 0x00000006)
|
||||
};
|
||||
|
||||
static const struct rtcl_reg_set rtcl_839x_mem_reg_set[] = {
|
||||
RTCL_REG_SET(100000000, 0x041cc, 0x00000000),
|
||||
RTCL_REG_SET(125000000, 0x041ac, 0x00000007),
|
||||
RTCL_REG_SET(150000000, 0x0414c, 0x00000006),
|
||||
RTCL_REG_SET(175000000, 0x0418c, 0x00000006),
|
||||
RTCL_REG_SET(200000000, 0x041cc, 0x00000006),
|
||||
RTCL_REG_SET(225000000, 0x0417c, 0x00000005),
|
||||
RTCL_REG_SET(250000000, 0x041ac, 0x00000005),
|
||||
RTCL_REG_SET(275000000, 0x0412c, 0x00000004),
|
||||
RTCL_REG_SET(300000000, 0x0414c, 0x00000004),
|
||||
RTCL_REG_SET(325000000, 0x0416c, 0x00000004),
|
||||
RTCL_REG_SET(350000000, 0x0418c, 0x00000004),
|
||||
RTCL_REG_SET(375000000, 0x041ac, 0x00000004),
|
||||
RTCL_REG_SET(400000000, 0x041cc, 0x00000004)
|
||||
};
|
||||
|
||||
static const struct rtcl_reg_set rtcl_839x_lxb_reg_set[] = {
|
||||
RTCL_REG_SET(50000000, 0x1414c, 0x00000003),
|
||||
RTCL_REG_SET(100000000, 0x0814c, 0x00000003),
|
||||
RTCL_REG_SET(150000000, 0x0414c, 0x00000003),
|
||||
RTCL_REG_SET(200000000, 0x0414c, 0x00000007)
|
||||
};
|
||||
|
||||
struct rtcl_rtab_set {
|
||||
int count;
|
||||
const struct rtcl_reg_set *rset;
|
||||
};
|
||||
|
||||
#define RTCL_RTAB_SET(_rset) \
|
||||
{ \
|
||||
.count = ARRAY_SIZE(_rset), \
|
||||
.rset = _rset, \
|
||||
}
|
||||
|
||||
static const struct rtcl_rtab_set rtcl_rtab_set[SOC_COUNT][CLK_COUNT] = {
|
||||
{
|
||||
RTCL_RTAB_SET(rtcl_838x_cpu_reg_set),
|
||||
RTCL_RTAB_SET(rtcl_838x_mem_reg_set),
|
||||
RTCL_RTAB_SET(rtcl_838x_lxb_reg_set)
|
||||
}, {
|
||||
RTCL_RTAB_SET(rtcl_839x_cpu_reg_set),
|
||||
RTCL_RTAB_SET(rtcl_839x_mem_reg_set),
|
||||
RTCL_RTAB_SET(rtcl_839x_lxb_reg_set)
|
||||
}
|
||||
};
|
||||
|
||||
#define RTCL_ROUND_SET(_min, _max, _step) \
|
||||
{ \
|
||||
.min = _min, \
|
||||
.max = _max, \
|
||||
.step = _step, \
|
||||
}
|
||||
|
||||
struct rtcl_round_set {
|
||||
unsigned long min;
|
||||
unsigned long max;
|
||||
unsigned long step;
|
||||
};
|
||||
|
||||
static const struct rtcl_round_set rtcl_round_set[SOC_COUNT][CLK_COUNT] = {
|
||||
{
|
||||
RTCL_ROUND_SET(300000000, 625000000, 25000000),
|
||||
RTCL_ROUND_SET(200000000, 375000000, 25000000),
|
||||
RTCL_ROUND_SET(100000000, 200000000, 25000000)
|
||||
}, {
|
||||
RTCL_ROUND_SET(400000000, 850000000, 25000000),
|
||||
RTCL_ROUND_SET(100000000, 400000000, 25000000),
|
||||
RTCL_ROUND_SET(50000000, 200000000, 50000000)
|
||||
}
|
||||
};
|
||||
|
||||
static const int rtcl_divn3[] = { 2, 3, 4, 6 };
|
||||
static const int rtcl_xdiv[] = { 2, 4, 2 };
|
||||
|
||||
/*
|
||||
* module data structures
|
||||
*/
|
||||
|
||||
#define RTCL_CLK_INFO(_idx, _name, _pname, _dname) \
|
||||
{ \
|
||||
.idx = _idx, \
|
||||
.name = _name, \
|
||||
.parent_name = _pname, \
|
||||
.display_name = _dname, \
|
||||
}
|
||||
|
||||
struct rtcl_clk_info {
|
||||
unsigned int idx;
|
||||
const char *name;
|
||||
const char *parent_name;
|
||||
const char *display_name;
|
||||
};
|
||||
|
||||
struct rtcl_clk {
|
||||
struct clk_hw hw;
|
||||
unsigned int idx;
|
||||
unsigned long min;
|
||||
unsigned long max;
|
||||
unsigned long rate;
|
||||
unsigned long startup;
|
||||
};
|
||||
|
||||
static const struct rtcl_clk_info rtcl_clk_info[CLK_COUNT] = {
|
||||
RTCL_CLK_INFO(CLK_CPU, "cpu_clk", "ref_clk", "CPU"),
|
||||
RTCL_CLK_INFO(CLK_MEM, "mem_clk", "ref_clk", "MEM"),
|
||||
RTCL_CLK_INFO(CLK_LXB, "lxb_clk", "ref_clk", "LXB")
|
||||
};
|
||||
|
||||
struct rtcl_dram {
|
||||
int type;
|
||||
int buswidth;
|
||||
};
|
||||
|
||||
struct rtcl_sram {
|
||||
int *pmark;
|
||||
unsigned long vbase;
|
||||
};
|
||||
|
||||
struct rtcl_ccu {
|
||||
spinlock_t lock;
|
||||
unsigned int soc;
|
||||
struct rtcl_sram sram;
|
||||
struct rtcl_dram dram;
|
||||
struct device_node *np;
|
||||
struct platform_device *pdev;
|
||||
struct rtcl_clk clks[CLK_COUNT];
|
||||
};
|
||||
|
||||
struct rtcl_ccu *rtcl_ccu;
|
||||
|
||||
#define rtcl_hw_to_clk(_hw) container_of(_hw, struct rtcl_clk, hw)
|
||||
|
||||
/*
|
||||
* SRAM relocatable assembler functions. The dram() parts point to normal kernel memory while
|
||||
* the sram() parts are the same functions but relocated to SRAM.
|
||||
*/
|
||||
|
||||
extern void rtcl_838x_dram_start(void);
|
||||
extern int rtcl_838x_dram_size;
|
||||
|
||||
extern void (*rtcl_838x_dram_set_rate)(int clk_idx, int ctrl0, int ctrl1);
|
||||
static void (*rtcl_838x_sram_set_rate)(int clk_idx, int ctrl0, int ctrl1);
|
||||
|
||||
extern void rtcl_839x_dram_start(void);
|
||||
extern int rtcl_839x_dram_size;
|
||||
|
||||
extern void (*rtcl_839x_dram_set_rate)(int clk_idx, int ctrl0, int ctrl1);
|
||||
static void (*rtcl_839x_sram_set_rate)(int clk_idx, int ctrl0, int ctrl1);
|
||||
|
||||
/*
|
||||
* clock setter/getter functions
|
||||
*/
|
||||
|
||||
static unsigned long rtcl_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
|
||||
{
|
||||
struct rtcl_clk *clk = rtcl_hw_to_clk(hw);
|
||||
unsigned int ctrl0, ctrl1, div1, div2, cmu_ncode_in;
|
||||
unsigned int cmu_sel_prediv, cmu_sel_div4, cmu_divn2, cmu_divn2_selb, cmu_divn3_sel;
|
||||
|
||||
if ((clk->idx >= CLK_COUNT) || (!rtcl_ccu) || (rtcl_ccu->soc >= SOC_COUNT))
|
||||
return 0;
|
||||
|
||||
ctrl0 = read_sw(rtcl_regs[rtcl_ccu->soc][REG_CTRL0][clk->idx]);
|
||||
ctrl1 = read_sw(rtcl_regs[rtcl_ccu->soc][REG_CTRL1][clk->idx]);
|
||||
|
||||
cmu_sel_prediv = 1 << RTL_PLL_CTRL0_CMU_SEL_PREDIV(ctrl0);
|
||||
cmu_sel_div4 = RTL_PLL_CTRL0_CMU_SEL_DIV4(ctrl0) ? 4 : 1;
|
||||
cmu_ncode_in = RTL_PLL_CTRL0_CMU_NCODE_IN(ctrl0) + 4;
|
||||
cmu_divn2 = RTL_PLL_CTRL0_CMU_DIVN2(ctrl0) + 4;
|
||||
|
||||
switch (rtcl_ccu->soc) {
|
||||
case SOC_RTL838X:
|
||||
cmu_divn2_selb = RTL838X_PLL_CTRL1_CMU_DIVN2_SELB(ctrl1);
|
||||
cmu_divn3_sel = rtcl_divn3[RTL838X_PLL_CTRL1_CMU_DIVN3_SEL(ctrl1)];
|
||||
break;
|
||||
case SOC_RTL839X:
|
||||
cmu_divn2_selb = RTL839X_PLL_CTRL1_CMU_DIVN2_SELB(ctrl1);
|
||||
cmu_divn3_sel = rtcl_divn3[RTL839X_PLL_CTRL1_CMU_DIVN3_SEL(ctrl1)];
|
||||
break;
|
||||
}
|
||||
div1 = cmu_divn2_selb ? cmu_divn3_sel : cmu_divn2;
|
||||
div2 = rtcl_xdiv[clk->idx];
|
||||
|
||||
return (((parent_rate / 16) * cmu_ncode_in) / (div1 * div2)) *
|
||||
cmu_sel_prediv * cmu_sel_div4 * 16;
|
||||
}
|
||||
|
||||
static int rtcl_838x_set_rate(int clk_idx, const struct rtcl_reg_set *reg)
|
||||
{
|
||||
unsigned long irqflags;
|
||||
/*
|
||||
* Runtime of this function (including locking)
|
||||
* CPU: up to 14000 cycles / up to 56 us at 250 MHz (half default speed)
|
||||
*/
|
||||
spin_lock_irqsave(&rtcl_ccu->lock, irqflags);
|
||||
rtcl_838x_sram_set_rate(clk_idx, reg->ctrl0, reg->ctrl1);
|
||||
spin_unlock_irqrestore(&rtcl_ccu->lock, irqflags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int rtcl_839x_set_rate(int clk_idx, const struct rtcl_reg_set *reg)
|
||||
{
|
||||
unsigned long vpflags;
|
||||
unsigned long irqflags;
|
||||
/*
|
||||
* Runtime of this function (including locking)
|
||||
* CPU: up to 31000 cycles / up to 89 us at 350 MHz (half default speed)
|
||||
*/
|
||||
spin_lock_irqsave(&rtcl_ccu->lock, irqflags);
|
||||
vpflags = dvpe();
|
||||
rtcl_839x_sram_set_rate(clk_idx, reg->ctrl0, reg->ctrl1);
|
||||
evpe(vpflags);
|
||||
spin_unlock_irqrestore(&rtcl_ccu->lock, irqflags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int rtcl_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate)
|
||||
{
|
||||
int tab_idx;
|
||||
struct rtcl_clk *clk = rtcl_hw_to_clk(hw);
|
||||
const struct rtcl_rtab_set *rtab = &rtcl_rtab_set[rtcl_ccu->soc][clk->idx];
|
||||
const struct rtcl_round_set *round = &rtcl_round_set[rtcl_ccu->soc][clk->idx];
|
||||
|
||||
if ((parent_rate != OSC_RATE) || (!rtcl_ccu->sram.vbase))
|
||||
return -EINVAL;
|
||||
/*
|
||||
* Currently we do not know if SRAM is stable on these devices. Maybe someone changes memory in
|
||||
* this region and does not care about proper allocation. So check if something might go wrong.
|
||||
*/
|
||||
if (unlikely(*rtcl_ccu->sram.pmark != RTL_SRAM_MARKER)) {
|
||||
dev_err(&rtcl_ccu->pdev->dev, "SRAM code lost\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
tab_idx = (rate - round->min) / round->step;
|
||||
if ((tab_idx < 0) || (tab_idx >= rtab->count) || (rtab->rset[tab_idx].rate != rate))
|
||||
return -EINVAL;
|
||||
|
||||
rtcl_ccu->clks[clk->idx].rate = rate;
|
||||
|
||||
switch (rtcl_ccu->soc) {
|
||||
case SOC_RTL838X:
|
||||
return rtcl_838x_set_rate(clk->idx, &rtab->rset[tab_idx]);
|
||||
case SOC_RTL839X:
|
||||
return rtcl_839x_set_rate(clk->idx, &rtab->rset[tab_idx]);
|
||||
}
|
||||
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
static long rtcl_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *parent_rate)
|
||||
{
|
||||
struct rtcl_clk *clk = rtcl_hw_to_clk(hw);
|
||||
unsigned long rrate = max(clk->min, min(clk->max, rate));
|
||||
const struct rtcl_round_set *round = &rtcl_round_set[rtcl_ccu->soc][clk->idx];
|
||||
|
||||
rrate = ((rrate + (round->step >> 1)) / round->step) * round->step;
|
||||
rrate -= (rrate > clk->max) ? round->step : 0;
|
||||
rrate += (rrate < clk->min) ? round->step : 0;
|
||||
|
||||
return rrate;
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialization functions to register the CCU and its clocks
|
||||
*/
|
||||
|
||||
#define RTCL_SRAM_FUNC(SOC, PBASE, FN) ({ \
|
||||
rtcl_##SOC##_sram_##FN = ((void *)&rtcl_##SOC##_dram_##FN \
|
||||
- (void *)&rtcl_##SOC##_dram_start) \
|
||||
+ (void *)PBASE; })
|
||||
|
||||
static const struct clk_ops rtcl_clk_ops = {
|
||||
.set_rate = rtcl_set_rate,
|
||||
.round_rate = rtcl_round_rate,
|
||||
.recalc_rate = rtcl_recalc_rate,
|
||||
};
|
||||
|
||||
static int rtcl_ccu_create(struct device_node *np)
|
||||
{
|
||||
int soc;
|
||||
|
||||
if (of_device_is_compatible(np, "realtek,rtl8380-clock"))
|
||||
soc = SOC_RTL838X;
|
||||
else if (of_device_is_compatible(np, "realtek,rtl8390-clock"))
|
||||
soc = SOC_RTL839X;
|
||||
else
|
||||
return -ENXIO;
|
||||
|
||||
rtcl_ccu = kzalloc(sizeof(*rtcl_ccu), GFP_KERNEL);
|
||||
if (IS_ERR(rtcl_ccu))
|
||||
return -ENOMEM;
|
||||
|
||||
rtcl_ccu->np = np;
|
||||
rtcl_ccu->soc = soc;
|
||||
rtcl_ccu->dram.type = RTL_MC_MCR_DRAMTYPE(read_soc(RTL_MC_MCR));
|
||||
rtcl_ccu->dram.buswidth = RTL_MC_DCR_BUSWIDTH(read_soc(RTL_MC_DCR));
|
||||
spin_lock_init(&rtcl_ccu->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int rtcl_register_clkhw(int clk_idx)
|
||||
{
|
||||
int ret;
|
||||
struct clk *clk;
|
||||
struct clk_init_data hw_init = { };
|
||||
struct rtcl_clk *rclk = &rtcl_ccu->clks[clk_idx];
|
||||
struct clk_parent_data parent_data = { .fw_name = rtcl_clk_info[clk_idx].parent_name };
|
||||
|
||||
rclk->idx = clk_idx;
|
||||
rclk->hw.init = &hw_init;
|
||||
|
||||
hw_init.num_parents = 1;
|
||||
hw_init.ops = &rtcl_clk_ops;
|
||||
hw_init.parent_data = &parent_data;
|
||||
hw_init.name = rtcl_clk_info[clk_idx].name;
|
||||
|
||||
ret = of_clk_hw_register(rtcl_ccu->np, &rclk->hw);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
clk_hw_register_clkdev(&rclk->hw, rtcl_clk_info[clk_idx].name, NULL);
|
||||
|
||||
clk = clk_get(NULL, rtcl_clk_info[clk_idx].name);
|
||||
rclk->startup = clk_get_rate(clk);
|
||||
clk_put(clk);
|
||||
|
||||
switch (clk_idx) {
|
||||
case CLK_CPU:
|
||||
rclk->min = rtcl_round_set[rtcl_ccu->soc][clk_idx].min;
|
||||
rclk->max = rtcl_round_set[rtcl_ccu->soc][clk_idx].max;
|
||||
break;
|
||||
default:
|
||||
/*
|
||||
* TODO: This driver supports PLL reclocking and nothing else. Additional required steps for non
|
||||
* CPU PLLs are missing. E.g. if we want to change memory clocks the right way we must adapt a lot
|
||||
* of other settings like MCR and DTRx timing registers (0xb80001000, 0xb8001008, ...) and initiate
|
||||
* a DLL reset so that hardware operates in the allowed limits. This is far too complex without
|
||||
* official support. Avoid this for now.
|
||||
*/
|
||||
rclk->min = rclk->max = rclk->startup;
|
||||
break;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct clk_hw *rtcl_get_clkhw(struct of_phandle_args *clkspec, void *prv)
|
||||
{
|
||||
unsigned int idx = clkspec->args[0];
|
||||
|
||||
if (idx >= CLK_COUNT) {
|
||||
pr_err("%s: Invalid index %u\n", __func__, idx);
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
return &rtcl_ccu->clks[idx].hw;
|
||||
}
|
||||
|
||||
static int rtcl_ccu_register_clocks(void)
|
||||
{
|
||||
int clk_idx, ret;
|
||||
|
||||
for (clk_idx = 0; clk_idx < CLK_COUNT; clk_idx++) {
|
||||
ret = rtcl_register_clkhw(clk_idx);
|
||||
if (ret) {
|
||||
pr_err("%s: Couldn't register %s clock\n",
|
||||
__func__, rtcl_clk_info[clk_idx].display_name);
|
||||
goto err_hw_unregister;
|
||||
}
|
||||
}
|
||||
|
||||
ret = of_clk_add_hw_provider(rtcl_ccu->np, rtcl_get_clkhw, rtcl_ccu);
|
||||
if (ret) {
|
||||
pr_err("%s: Couldn't register clock provider of %s\n",
|
||||
__func__, of_node_full_name(rtcl_ccu->np));
|
||||
goto err_hw_unregister;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_hw_unregister:
|
||||
for (--clk_idx; clk_idx >= 0; --clk_idx)
|
||||
clk_hw_unregister(&rtcl_ccu->clks[clk_idx].hw);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
int rtcl_init_sram(void)
|
||||
{
|
||||
struct gen_pool *sram_pool;
|
||||
phys_addr_t sram_pbase;
|
||||
unsigned long sram_vbase;
|
||||
struct device_node *node;
|
||||
struct platform_device *pdev = NULL;
|
||||
void *dram_start;
|
||||
int dram_size;
|
||||
const char *wrn = ", rate setting disabled.\n";
|
||||
|
||||
switch (rtcl_ccu->soc) {
|
||||
case SOC_RTL838X:
|
||||
dram_start = &rtcl_838x_dram_start;
|
||||
dram_size = rtcl_838x_dram_size;
|
||||
break;
|
||||
case SOC_RTL839X:
|
||||
dram_start = &rtcl_839x_dram_start;
|
||||
dram_size = rtcl_839x_dram_size;
|
||||
break;
|
||||
default:
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
for_each_compatible_node(node, NULL, "mmio-sram") {
|
||||
pdev = of_find_device_by_node(node);
|
||||
if (pdev) {
|
||||
of_node_put(node);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!pdev) {
|
||||
dev_warn(&rtcl_ccu->pdev->dev, "no SRAM device found%s", wrn);
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
sram_pool = gen_pool_get(&pdev->dev, NULL);
|
||||
if (!sram_pool) {
|
||||
dev_warn(&rtcl_ccu->pdev->dev, "SRAM pool unavailable%s", wrn);
|
||||
goto err_put_device;
|
||||
}
|
||||
|
||||
sram_vbase = gen_pool_alloc(sram_pool, dram_size);
|
||||
if (!sram_vbase) {
|
||||
dev_warn(&rtcl_ccu->pdev->dev, "can not allocate SRAM%s", wrn);
|
||||
goto err_put_device;
|
||||
}
|
||||
|
||||
sram_pbase = gen_pool_virt_to_phys(sram_pool, sram_vbase);
|
||||
memcpy((void *)sram_pbase, dram_start, dram_size);
|
||||
flush_icache_range((unsigned long)sram_pbase, (unsigned long)(sram_pbase + dram_size));
|
||||
|
||||
switch (rtcl_ccu->soc) {
|
||||
case SOC_RTL838X:
|
||||
RTCL_SRAM_FUNC(838x, sram_pbase, set_rate);
|
||||
break;
|
||||
case SOC_RTL839X:
|
||||
RTCL_SRAM_FUNC(839x, sram_pbase, set_rate);
|
||||
break;
|
||||
}
|
||||
|
||||
rtcl_ccu->sram.pmark = (int *)((void *)sram_pbase + (dram_size - 4));
|
||||
rtcl_ccu->sram.vbase = sram_vbase;
|
||||
|
||||
return 0;
|
||||
|
||||
err_put_device:
|
||||
put_device(&pdev->dev);
|
||||
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
void rtcl_ccu_log_early(void)
|
||||
{
|
||||
int clk_idx;
|
||||
char meminfo[80], clkinfo[255], msg[255] = "rtl83xx-clk: initialized";
|
||||
|
||||
sprintf(meminfo, " (%d Bit DDR%d)", rtcl_ccu->dram.buswidth, rtcl_ccu->dram.type);
|
||||
for (clk_idx = 0; clk_idx < CLK_COUNT; clk_idx++) {
|
||||
sprintf(clkinfo, ", %s %lu MHz", rtcl_clk_info[clk_idx].display_name,
|
||||
rtcl_ccu->clks[clk_idx].startup / 1000000);
|
||||
if (clk_idx == CLK_MEM)
|
||||
strcat(clkinfo, meminfo);
|
||||
strcat(msg, clkinfo);
|
||||
}
|
||||
pr_info("%s\n", msg);
|
||||
}
|
||||
|
||||
void rtcl_ccu_log_late(void)
|
||||
{
|
||||
int clk_idx;
|
||||
struct rtcl_clk *rclk;
|
||||
bool overclock = false;
|
||||
char clkinfo[80], msg[255] = "rate setting enabled";
|
||||
|
||||
for (clk_idx = 0; clk_idx < CLK_COUNT; clk_idx++) {
|
||||
rclk = &rtcl_ccu->clks[clk_idx];
|
||||
overclock |= rclk->max > rclk->startup;
|
||||
sprintf(clkinfo, ", %s %lu-%lu MHz", rtcl_clk_info[clk_idx].display_name,
|
||||
rclk->min / 1000000, rclk->max / 1000000);
|
||||
strcat(msg, clkinfo);
|
||||
}
|
||||
if (overclock)
|
||||
strcat(msg, ", OVERCLOCK AT OWN RISK");
|
||||
|
||||
dev_info(&rtcl_ccu->pdev->dev, "%s\n", msg);
|
||||
}
|
||||
|
||||
/*
|
||||
* Early registration: This module provides core startup clocks that are needed for generic SOC
|
||||
* init and for further builtin devices (e.g. UART). Register asap via clock framework.
|
||||
*/
|
||||
|
||||
static void __init rtcl_probe_early(struct device_node *np)
|
||||
{
|
||||
if (rtcl_ccu_create(np))
|
||||
return;
|
||||
|
||||
if (rtcl_ccu_register_clocks())
|
||||
kfree(rtcl_ccu);
|
||||
else
|
||||
rtcl_ccu_log_early();
|
||||
}
|
||||
|
||||
CLK_OF_DECLARE_DRIVER(rtl838x_clk, "realtek,rtl8380-clock", rtcl_probe_early);
|
||||
CLK_OF_DECLARE_DRIVER(rtl839x_clk, "realtek,rtl8390-clock", rtcl_probe_early);
|
||||
|
||||
/*
|
||||
* Late registration: Finally register as normal platform driver. At this point we can make use
|
||||
* of other modules like SRAM.
|
||||
*/
|
||||
|
||||
static const struct of_device_id rtcl_dt_ids[] = {
|
||||
{ .compatible = "realtek,rtl8380-clock" },
|
||||
{ .compatible = "realtek,rtl8390-clock" },
|
||||
{}
|
||||
};
|
||||
|
||||
static int rtcl_probe_late(struct platform_device *pdev)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (!rtcl_ccu) {
|
||||
dev_err(&pdev->dev, "early initialization not run");
|
||||
return -ENXIO;
|
||||
}
|
||||
rtcl_ccu->pdev = pdev;
|
||||
ret = rtcl_init_sram();
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
rtcl_ccu_log_late();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver rtcl_platform_driver = {
|
||||
.driver = {
|
||||
.name = "rtl83xx-clk",
|
||||
.of_match_table = rtcl_dt_ids,
|
||||
},
|
||||
.probe = rtcl_probe_late,
|
||||
};
|
||||
|
||||
static int __init rtcl_init_subsys(void)
|
||||
{
|
||||
return platform_driver_register(&rtcl_platform_driver);
|
||||
}
|
||||
|
||||
/*
|
||||
* The driver does not know when SRAM module has finally loaded. With an arch_initcall() we might
|
||||
* overtake SRAM initialization. Be polite and give the system a little more time.
|
||||
*/
|
||||
|
||||
subsys_initcall(rtcl_init_subsys);
|
||||
@ -0,0 +1,75 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0-only */
|
||||
/*
|
||||
* Realtek RTL83XX clock headers
|
||||
* Copyright (C) 2022 Markus Stockhausen <markus.stockhausen@gmx.de>
|
||||
*/
|
||||
|
||||
/*
|
||||
* Switch registers (e.g. PLL)
|
||||
*/
|
||||
|
||||
#define RTL_SW_CORE_BASE (0xbb000000)
|
||||
|
||||
#define RTL838X_PLL_GLB_CTRL (0x0fc0)
|
||||
#define RTL838X_PLL_CPU_CTRL0 (0x0fc4)
|
||||
#define RTL838X_PLL_CPU_CTRL1 (0x0fc8)
|
||||
#define RTL838X_PLL_LXB_CTRL0 (0x0fd0)
|
||||
#define RTL838X_PLL_LXB_CTRL1 (0x0fd4)
|
||||
#define RTL838X_PLL_MEM_CTRL0 (0x0fdc)
|
||||
#define RTL838X_PLL_MEM_CTRL1 (0x0fe0)
|
||||
|
||||
#define RTL839X_PLL_GLB_CTRL (0x0024)
|
||||
#define RTL839X_PLL_CPU_CTRL0 (0x0028)
|
||||
#define RTL839X_PLL_CPU_CTRL1 (0x002c)
|
||||
#define RTL839X_PLL_LXB_CTRL0 (0x0038)
|
||||
#define RTL839X_PLL_LXB_CTRL1 (0x003c)
|
||||
#define RTL839X_PLL_MEM_CTRL0 (0x0048)
|
||||
#define RTL839X_PLL_MEM_CTRL1 (0x004c)
|
||||
|
||||
#define RTL_PLL_CTRL0_CMU_SEL_PREDIV(v) (((v) >> 0) & 0x3)
|
||||
#define RTL_PLL_CTRL0_CMU_SEL_DIV4(v) (((v) >> 2) & 0x1)
|
||||
#define RTL_PLL_CTRL0_CMU_NCODE_IN(v) (((v) >> 4) & 0xff)
|
||||
#define RTL_PLL_CTRL0_CMU_DIVN2(v) (((v) >> 12) & 0xff)
|
||||
|
||||
#define RTL838X_GLB_CTRL_EN_CPU_PLL_MASK (1 << 0)
|
||||
#define RTL838X_GLB_CTRL_EN_LXB_PLL_MASK (1 << 1)
|
||||
#define RTL838X_GLB_CTRL_EN_MEM_PLL_MASK (1 << 2)
|
||||
#define RTL838X_GLB_CTRL_CPU_PLL_READY_MASK (1 << 8)
|
||||
#define RTL838X_GLB_CTRL_LXB_PLL_READY_MASK (1 << 9)
|
||||
#define RTL838X_GLB_CTRL_MEM_PLL_READY_MASK (1 << 10)
|
||||
#define RTL838X_GLB_CTRL_CPU_PLL_SC_MUX_MASK (1 << 12)
|
||||
|
||||
#define RTL838X_PLL_CTRL1_CMU_DIVN2_SELB(v) (((v) >> 26) & 0x1)
|
||||
#define RTL838X_PLL_CTRL1_CMU_DIVN3_SEL(v) (((v) >> 27) & 0x3)
|
||||
|
||||
#define RTL839X_GLB_CTRL_CPU_CLKSEL_MASK (1 << 11)
|
||||
#define RTL839X_GLB_CTRL_MEM_CLKSEL_MASK (1 << 12)
|
||||
#define RTL839X_GLB_CTRL_LXB_CLKSEL_MASK (1 << 13)
|
||||
|
||||
#define RTL839X_PLL_CTRL1_CMU_DIVN2_SELB(v) (((v) >> 2) & 0x1)
|
||||
#define RTL839X_PLL_CTRL1_CMU_DIVN3_SEL(v) (((v) >> 0) & 0x3)
|
||||
|
||||
/*
|
||||
* Core registers (e.g. memory controller)
|
||||
*/
|
||||
|
||||
#define RTL_SOC_BASE (0xB8000000)
|
||||
|
||||
#define RTL_MC_MCR (0x1000)
|
||||
#define RTL_MC_DCR (0x1004)
|
||||
#define RTL_MC_DTR0 (0x1008)
|
||||
#define RTL_MC_DTR1 (0x100c)
|
||||
#define RTL_MC_DTR2 (0x1010)
|
||||
#define RTL_MC_DMCR (0x101c)
|
||||
#define RTL_MC_DACCR (0x1500)
|
||||
#define RTL_MC_DCDR (0x1060)
|
||||
|
||||
#define RTL_MC_MCR_DRAMTYPE(v) ((((v) >> 28) & 0xf) + 1)
|
||||
#define RTL_MC_DCR_BUSWIDTH(v) (8 << (((v) >> 24) & 0xf))
|
||||
|
||||
/*
|
||||
* Other stuff
|
||||
*/
|
||||
|
||||
#define RTL_SRAM_MARKER (0x5eaf00d5)
|
||||
#define RTL_SRAM_BASE (0x9f000000)
|
||||
Loading…
Reference in New Issue
Block a user