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![Simon Glass](/assets/img/avatar_default.png)
At present this function sits in its own file but it does not really justify it. There are similar string functions in vsprintf.h, so move it there. Also add the missing function comment. Use the vsprintf.h include file explicitly where needed. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
419 lines
9.4 KiB
C
419 lines
9.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2017
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* Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
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*/
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#include <common.h>
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#include <clk-uclass.h>
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#include <dm.h>
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#include <vsprintf.h>
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#include <dm/lists.h>
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#include <dt-bindings/clk/mpc83xx-clk.h>
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#include <asm/arch/soc.h>
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#include "mpc83xx_clk.h"
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* struct mpc83xx_clk_priv - Private data structure for the MPC83xx clock
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* driver
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* @speed: Array containing the speed values of all system clocks (initialized
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* once, then only read back)
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*/
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struct mpc83xx_clk_priv {
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u32 speed[MPC83XX_CLK_COUNT];
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};
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/**
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* is_clk_valid() - Check if clock ID is valid for given clock device
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* @clk: The clock device for which to check a clock ID
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* @id: The clock ID to check
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*
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* Return: true if clock ID is valid for clock device, false if not
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*/
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static inline bool is_clk_valid(struct udevice *clk, int id)
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{
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ulong type = dev_get_driver_data(clk);
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switch (id) {
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case MPC83XX_CLK_MEM:
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return true;
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case MPC83XX_CLK_MEM_SEC:
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return type == SOC_MPC8360;
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case MPC83XX_CLK_ENC:
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return (type == SOC_MPC8308) || (type == SOC_MPC8309);
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case MPC83XX_CLK_I2C1:
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return true;
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case MPC83XX_CLK_TDM:
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return type == SOC_MPC8315;
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case MPC83XX_CLK_SDHC:
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return mpc83xx_has_sdhc(type);
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case MPC83XX_CLK_TSEC1:
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case MPC83XX_CLK_TSEC2:
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return mpc83xx_has_tsec(type);
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case MPC83XX_CLK_USBDR:
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return type == SOC_MPC8360;
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case MPC83XX_CLK_USBMPH:
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return type == SOC_MPC8349;
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case MPC83XX_CLK_PCIEXP1:
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return mpc83xx_has_pcie1(type);
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case MPC83XX_CLK_PCIEXP2:
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return mpc83xx_has_pcie2(type);
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case MPC83XX_CLK_SATA:
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return mpc83xx_has_sata(type);
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case MPC83XX_CLK_DMAC:
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return (type == SOC_MPC8308) || (type == SOC_MPC8309);
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case MPC83XX_CLK_PCI:
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return mpc83xx_has_pci(type);
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case MPC83XX_CLK_CSB:
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return true;
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case MPC83XX_CLK_I2C2:
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return mpc83xx_has_second_i2c(type);
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case MPC83XX_CLK_QE:
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case MPC83XX_CLK_BRG:
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return mpc83xx_has_quicc_engine(type) && (type != SOC_MPC8309);
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case MPC83XX_CLK_LCLK:
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case MPC83XX_CLK_LBIU:
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case MPC83XX_CLK_CORE:
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return true;
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}
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return false;
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}
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/**
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* init_single_clk() - Initialize a clock with a given ID
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* @dev: The clock device for which to initialize the clock
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* @clk: The clock ID
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*
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* The clock speed is read from the hardware's registers, and stored in the
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* private data structure of the driver. From there it is only retrieved, and
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* not set.
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*
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* Return: 0 if OK, -ve on error
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*/
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static int init_single_clk(struct udevice *dev, int clk)
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{
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struct mpc83xx_clk_priv *priv = dev_get_priv(dev);
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immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
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ulong type = dev_get_driver_data(dev);
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struct clk_mode mode;
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ulong mask;
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u32 csb_clk = get_csb_clk(im);
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int ret;
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ret = retrieve_mode(clk, type, &mode);
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if (ret) {
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debug("%s: Could not retrieve mode for clk %d (ret = %d)\n",
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dev->name, clk, ret);
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return ret;
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}
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if (mode.type == TYPE_INVALID) {
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debug("%s: clock %d invalid\n", dev->name, clk);
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return -EINVAL;
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}
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if (mode.type == TYPE_SCCR_STANDARD) {
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mask = GENMASK(31 - mode.low, 31 - mode.high);
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switch (sccr_field(im, mask)) {
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case 0:
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priv->speed[clk] = 0;
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break;
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case 1:
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priv->speed[clk] = csb_clk;
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break;
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case 2:
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priv->speed[clk] = csb_clk / 2;
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break;
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case 3:
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priv->speed[clk] = csb_clk / 3;
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break;
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default:
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priv->speed[clk] = 0;
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}
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return 0;
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}
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if (mode.type == TYPE_SPMR_DIRECT_MULTIPLY) {
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mask = GENMASK(31 - mode.low, 31 - mode.high);
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priv->speed[clk] = csb_clk * (1 + sccr_field(im, mask));
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return 0;
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}
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if (clk == MPC83XX_CLK_CSB || clk == MPC83XX_CLK_I2C2) {
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priv->speed[clk] = csb_clk; /* i2c-2 clk is equal to csb clk */
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return 0;
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}
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if (clk == MPC83XX_CLK_QE || clk == MPC83XX_CLK_BRG) {
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u32 pci_sync_in = get_pci_sync_in(im);
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u32 qepmf = spmr_field(im, SPMR_CEPMF);
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u32 qepdf = spmr_field(im, SPMR_CEPDF);
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u32 qe_clk = (pci_sync_in * qepmf) / (1 + qepdf);
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if (clk == MPC83XX_CLK_QE)
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priv->speed[clk] = qe_clk;
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else
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priv->speed[clk] = qe_clk / 2;
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return 0;
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}
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if (clk == MPC83XX_CLK_LCLK || clk == MPC83XX_CLK_LBIU) {
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u32 lbiu_clk = csb_clk *
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(1 + spmr_field(im, SPMR_LBIUCM));
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u32 clkdiv = lcrr_field(im, LCRR_CLKDIV);
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if (clk == MPC83XX_CLK_LBIU)
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priv->speed[clk] = lbiu_clk;
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switch (clkdiv) {
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case 2:
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case 4:
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case 8:
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priv->speed[clk] = lbiu_clk / clkdiv;
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break;
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default:
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/* unknown lcrr */
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priv->speed[clk] = 0;
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}
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return 0;
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}
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if (clk == MPC83XX_CLK_CORE) {
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u8 corepll = spmr_field(im, SPMR_COREPLL);
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u32 corecnf_tab_index = ((corepll & 0x1F) << 2) |
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((corepll & 0x60) >> 5);
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if (corecnf_tab_index > (ARRAY_SIZE(corecnf_tab))) {
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debug("%s: Core configuration index %02x too high; possible wrong value",
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dev->name, corecnf_tab_index);
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return -EINVAL;
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}
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switch (corecnf_tab[corecnf_tab_index].core_csb_ratio) {
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case RAT_BYP:
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case RAT_1_TO_1:
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priv->speed[clk] = csb_clk;
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break;
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case RAT_1_5_TO_1:
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priv->speed[clk] = (3 * csb_clk) / 2;
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break;
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case RAT_2_TO_1:
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priv->speed[clk] = 2 * csb_clk;
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break;
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case RAT_2_5_TO_1:
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priv->speed[clk] = (5 * csb_clk) / 2;
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break;
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case RAT_3_TO_1:
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priv->speed[clk] = 3 * csb_clk;
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break;
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default:
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/* unknown core to csb ratio */
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priv->speed[clk] = 0;
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}
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return 0;
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}
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/* Unknown clk value -> error */
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debug("%s: clock %d invalid\n", dev->name, clk);
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return -EINVAL;
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}
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/**
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* init_all_clks() - Initialize all clocks of a clock device
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* @dev: The clock device whose clocks should be initialized
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*
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* Return: 0 if OK, -ve on error
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*/
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static inline int init_all_clks(struct udevice *dev)
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{
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int i;
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for (i = 0; i < MPC83XX_CLK_COUNT; i++) {
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int ret;
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if (!is_clk_valid(dev, i))
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continue;
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ret = init_single_clk(dev, i);
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if (ret) {
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debug("%s: Failed to initialize %s clock\n",
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dev->name, names[i]);
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return ret;
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}
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}
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return 0;
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}
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static int mpc83xx_clk_request(struct clk *clock)
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{
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/* Reject requests of clocks that are not available */
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if (is_clk_valid(clock->dev, clock->id))
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return 0;
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else
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return -ENODEV;
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}
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static ulong mpc83xx_clk_get_rate(struct clk *clk)
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{
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struct mpc83xx_clk_priv *priv = dev_get_priv(clk->dev);
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if (clk->id >= MPC83XX_CLK_COUNT) {
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debug("%s: clock index %lu invalid\n", __func__, clk->id);
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return 0;
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}
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return priv->speed[clk->id];
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}
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static int mpc83xx_clk_enable(struct clk *clk)
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{
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/* MPC83xx clocks are always enabled */
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return 0;
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}
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int get_clocks(void)
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{
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/* Empty implementation to keep the prototype in common.h happy */
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return 0;
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}
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int get_serial_clock(void)
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{
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struct mpc83xx_clk_priv *priv;
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struct udevice *clk;
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int ret;
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ret = uclass_first_device_err(UCLASS_CLK, &clk);
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if (ret) {
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debug("%s: Could not get clock device\n", __func__);
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return ret;
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}
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priv = dev_get_priv(clk);
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return priv->speed[MPC83XX_CLK_CSB];
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}
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const struct clk_ops mpc83xx_clk_ops = {
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.request = mpc83xx_clk_request,
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.get_rate = mpc83xx_clk_get_rate,
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.enable = mpc83xx_clk_enable,
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};
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static const struct udevice_id mpc83xx_clk_match[] = {
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{ .compatible = "fsl,mpc8308-clk", .data = SOC_MPC8308 },
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{ .compatible = "fsl,mpc8309-clk", .data = SOC_MPC8309 },
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{ .compatible = "fsl,mpc8313-clk", .data = SOC_MPC8313 },
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{ .compatible = "fsl,mpc8315-clk", .data = SOC_MPC8315 },
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{ .compatible = "fsl,mpc832x-clk", .data = SOC_MPC832X },
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{ .compatible = "fsl,mpc8349-clk", .data = SOC_MPC8349 },
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{ .compatible = "fsl,mpc8360-clk", .data = SOC_MPC8360 },
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{ .compatible = "fsl,mpc8379-clk", .data = SOC_MPC8379 },
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{ /* sentinel */ }
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};
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static int mpc83xx_clk_probe(struct udevice *dev)
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{
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struct mpc83xx_clk_priv *priv = dev_get_priv(dev);
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ulong type;
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int ret;
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ret = init_all_clks(dev);
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if (ret) {
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debug("%s: Could not initialize all clocks (ret = %d)\n",
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dev->name, ret);
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return ret;
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}
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type = dev_get_driver_data(dev);
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if (mpc83xx_has_sdhc(type))
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gd->arch.sdhc_clk = priv->speed[MPC83XX_CLK_SDHC];
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gd->arch.core_clk = priv->speed[MPC83XX_CLK_CORE];
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gd->arch.i2c1_clk = priv->speed[MPC83XX_CLK_I2C1];
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if (mpc83xx_has_second_i2c(type))
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gd->arch.i2c2_clk = priv->speed[MPC83XX_CLK_I2C2];
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gd->mem_clk = priv->speed[MPC83XX_CLK_MEM];
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if (mpc83xx_has_pci(type))
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gd->pci_clk = priv->speed[MPC83XX_CLK_PCI];
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gd->cpu_clk = priv->speed[MPC83XX_CLK_CORE];
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gd->bus_clk = priv->speed[MPC83XX_CLK_CSB];
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return 0;
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}
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static int mpc83xx_clk_bind(struct udevice *dev)
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{
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int ret;
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struct udevice *sys_child;
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/*
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* Since there is no corresponding device tree entry, and since the
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* clock driver has to be present in either case, bind the sysreset
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* driver here.
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*/
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ret = device_bind_driver(dev, "mpc83xx_sysreset", "sysreset",
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&sys_child);
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if (ret)
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debug("%s: No sysreset driver: ret=%d\n",
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dev->name, ret);
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return 0;
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}
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U_BOOT_DRIVER(mpc83xx_clk) = {
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.name = "mpc83xx_clk",
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.id = UCLASS_CLK,
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.of_match = mpc83xx_clk_match,
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.ops = &mpc83xx_clk_ops,
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.probe = mpc83xx_clk_probe,
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.priv_auto_alloc_size = sizeof(struct mpc83xx_clk_priv),
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.bind = mpc83xx_clk_bind,
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};
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static int do_clocks(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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int i;
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char buf[32];
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struct udevice *clk;
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int ret;
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struct mpc83xx_clk_priv *priv;
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ret = uclass_first_device_err(UCLASS_CLK, &clk);
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if (ret) {
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debug("%s: Could not get clock device\n", __func__);
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return ret;
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}
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for (i = 0; i < MPC83XX_CLK_COUNT; i++) {
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if (!is_clk_valid(clk, i))
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continue;
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priv = dev_get_priv(clk);
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printf("%s = %s MHz\n", names[i], strmhz(buf, priv->speed[i]));
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}
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return 0;
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}
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U_BOOT_CMD(clocks, 1, 1, do_clocks,
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"display values of SoC's clocks",
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""
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);
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