18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0+ 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * This driver provides regmap to access to analog part of audio codec 48c2ecf20Sopenharmony_ci * found on Allwinner A23, A31s, A33, H3 and A64 Socs 58c2ecf20Sopenharmony_ci * 68c2ecf20Sopenharmony_ci * Copyright 2016 Chen-Yu Tsai <wens@csie.org> 78c2ecf20Sopenharmony_ci * Copyright (C) 2018 Vasily Khoruzhick <anarsoul@gmail.com> 88c2ecf20Sopenharmony_ci */ 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ci#include <linux/io.h> 118c2ecf20Sopenharmony_ci#include <linux/kernel.h> 128c2ecf20Sopenharmony_ci#include <linux/module.h> 138c2ecf20Sopenharmony_ci#include <linux/regmap.h> 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ci#include "sun8i-adda-pr-regmap.h" 168c2ecf20Sopenharmony_ci 178c2ecf20Sopenharmony_ci/* Analog control register access bits */ 188c2ecf20Sopenharmony_ci#define ADDA_PR 0x0 /* PRCM base + 0x1c0 */ 198c2ecf20Sopenharmony_ci#define ADDA_PR_RESET BIT(28) 208c2ecf20Sopenharmony_ci#define ADDA_PR_WRITE BIT(24) 218c2ecf20Sopenharmony_ci#define ADDA_PR_ADDR_SHIFT 16 228c2ecf20Sopenharmony_ci#define ADDA_PR_ADDR_MASK GENMASK(4, 0) 238c2ecf20Sopenharmony_ci#define ADDA_PR_DATA_IN_SHIFT 8 248c2ecf20Sopenharmony_ci#define ADDA_PR_DATA_IN_MASK GENMASK(7, 0) 258c2ecf20Sopenharmony_ci#define ADDA_PR_DATA_OUT_SHIFT 0 268c2ecf20Sopenharmony_ci#define ADDA_PR_DATA_OUT_MASK GENMASK(7, 0) 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_ci/* regmap access bits */ 298c2ecf20Sopenharmony_cistatic int adda_reg_read(void *context, unsigned int reg, unsigned int *val) 308c2ecf20Sopenharmony_ci{ 318c2ecf20Sopenharmony_ci void __iomem *base = (void __iomem *)context; 328c2ecf20Sopenharmony_ci u32 tmp; 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ci /* De-assert reset */ 358c2ecf20Sopenharmony_ci writel(readl(base) | ADDA_PR_RESET, base); 368c2ecf20Sopenharmony_ci 378c2ecf20Sopenharmony_ci /* Clear write bit */ 388c2ecf20Sopenharmony_ci writel(readl(base) & ~ADDA_PR_WRITE, base); 398c2ecf20Sopenharmony_ci 408c2ecf20Sopenharmony_ci /* Set register address */ 418c2ecf20Sopenharmony_ci tmp = readl(base); 428c2ecf20Sopenharmony_ci tmp &= ~(ADDA_PR_ADDR_MASK << ADDA_PR_ADDR_SHIFT); 438c2ecf20Sopenharmony_ci tmp |= (reg & ADDA_PR_ADDR_MASK) << ADDA_PR_ADDR_SHIFT; 448c2ecf20Sopenharmony_ci writel(tmp, base); 458c2ecf20Sopenharmony_ci 468c2ecf20Sopenharmony_ci /* Read back value */ 478c2ecf20Sopenharmony_ci *val = readl(base) & ADDA_PR_DATA_OUT_MASK; 488c2ecf20Sopenharmony_ci 498c2ecf20Sopenharmony_ci return 0; 508c2ecf20Sopenharmony_ci} 518c2ecf20Sopenharmony_ci 528c2ecf20Sopenharmony_cistatic int adda_reg_write(void *context, unsigned int reg, unsigned int val) 538c2ecf20Sopenharmony_ci{ 548c2ecf20Sopenharmony_ci void __iomem *base = (void __iomem *)context; 558c2ecf20Sopenharmony_ci u32 tmp; 568c2ecf20Sopenharmony_ci 578c2ecf20Sopenharmony_ci /* De-assert reset */ 588c2ecf20Sopenharmony_ci writel(readl(base) | ADDA_PR_RESET, base); 598c2ecf20Sopenharmony_ci 608c2ecf20Sopenharmony_ci /* Set register address */ 618c2ecf20Sopenharmony_ci tmp = readl(base); 628c2ecf20Sopenharmony_ci tmp &= ~(ADDA_PR_ADDR_MASK << ADDA_PR_ADDR_SHIFT); 638c2ecf20Sopenharmony_ci tmp |= (reg & ADDA_PR_ADDR_MASK) << ADDA_PR_ADDR_SHIFT; 648c2ecf20Sopenharmony_ci writel(tmp, base); 658c2ecf20Sopenharmony_ci 668c2ecf20Sopenharmony_ci /* Set data to write */ 678c2ecf20Sopenharmony_ci tmp = readl(base); 688c2ecf20Sopenharmony_ci tmp &= ~(ADDA_PR_DATA_IN_MASK << ADDA_PR_DATA_IN_SHIFT); 698c2ecf20Sopenharmony_ci tmp |= (val & ADDA_PR_DATA_IN_MASK) << ADDA_PR_DATA_IN_SHIFT; 708c2ecf20Sopenharmony_ci writel(tmp, base); 718c2ecf20Sopenharmony_ci 728c2ecf20Sopenharmony_ci /* Set write bit to signal a write */ 738c2ecf20Sopenharmony_ci writel(readl(base) | ADDA_PR_WRITE, base); 748c2ecf20Sopenharmony_ci 758c2ecf20Sopenharmony_ci /* Clear write bit */ 768c2ecf20Sopenharmony_ci writel(readl(base) & ~ADDA_PR_WRITE, base); 778c2ecf20Sopenharmony_ci 788c2ecf20Sopenharmony_ci return 0; 798c2ecf20Sopenharmony_ci} 808c2ecf20Sopenharmony_ci 818c2ecf20Sopenharmony_cistatic const struct regmap_config adda_pr_regmap_cfg = { 828c2ecf20Sopenharmony_ci .name = "adda-pr", 838c2ecf20Sopenharmony_ci .reg_bits = 5, 848c2ecf20Sopenharmony_ci .reg_stride = 1, 858c2ecf20Sopenharmony_ci .val_bits = 8, 868c2ecf20Sopenharmony_ci .reg_read = adda_reg_read, 878c2ecf20Sopenharmony_ci .reg_write = adda_reg_write, 888c2ecf20Sopenharmony_ci .fast_io = true, 898c2ecf20Sopenharmony_ci .max_register = 31, 908c2ecf20Sopenharmony_ci}; 918c2ecf20Sopenharmony_ci 928c2ecf20Sopenharmony_cistruct regmap *sun8i_adda_pr_regmap_init(struct device *dev, 938c2ecf20Sopenharmony_ci void __iomem *base) 948c2ecf20Sopenharmony_ci{ 958c2ecf20Sopenharmony_ci return devm_regmap_init(dev, NULL, base, &adda_pr_regmap_cfg); 968c2ecf20Sopenharmony_ci} 978c2ecf20Sopenharmony_ciEXPORT_SYMBOL_GPL(sun8i_adda_pr_regmap_init); 988c2ecf20Sopenharmony_ci 998c2ecf20Sopenharmony_ciMODULE_DESCRIPTION("Allwinner analog audio codec regmap driver"); 1008c2ecf20Sopenharmony_ciMODULE_AUTHOR("Vasily Khoruzhick <anarsoul@gmail.com>"); 1018c2ecf20Sopenharmony_ciMODULE_LICENSE("GPL"); 1028c2ecf20Sopenharmony_ciMODULE_ALIAS("platform:sunxi-adda-pr"); 103