1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2019 Rockchip Electronics Co., Ltd 4 */ 5 #include <common.h> 6 #include <asm/io.h> 7 #include <dm.h> 8 #include <linux/bitops.h> 9 #include <misc.h> 10 #include <misc_decompress.h> 11 #include <irq-generic.h> 12 13 DECLARE_GLOBAL_DATA_PTR; 14 15 #define DECOM_CTRL 0x0 16 #define DECOM_ENR 0x4 17 #define DECOM_RADDR 0x8 18 #define DECOM_WADDR 0xc 19 #define DECOM_UDDSL 0x10 20 #define DECOM_UDDSH 0x14 21 #define DECOM_TXTHR 0x18 22 #define DECOM_RXTHR 0x1c 23 #define DECOM_SLEN 0x20 24 #define DECOM_STAT 0x24 25 #define DECOM_ISR 0x28 26 #define DECOM_IEN 0x2c 27 #define DECOM_AXI_STAT 0x30 28 #define DECOM_TSIZEL 0x34 29 #define DECOM_TSIZEH 0x38 30 #define DECOM_MGNUM 0x3c 31 #define DECOM_FRAME 0x40 32 #define DECOM_DICTID 0x44 33 #define DECOM_CSL 0x48 34 #define DECOM_CSH 0x4c 35 36 #define LZ4_HEAD_CSUM_CHECK_EN BIT(1) 37 #define LZ4_BLOCK_CSUM_CHECK_EN BIT(2) 38 #define LZ4_CONT_CSUM_CHECK_EN BIT(3) 39 40 #define DSOLIEN BIT(19) 41 #define ZDICTEIEN BIT(18) 42 #define GCMEIEN BIT(17) 43 #define GIDEIEN BIT(16) 44 #define CCCEIEN BIT(15) 45 #define BCCEIEN BIT(14) 46 #define HCCEIEN BIT(13) 47 #define CSEIEN BIT(12) 48 #define DICTEIEN BIT(11) 49 #define VNEIEN BIT(10) 50 #define WNEIEN BIT(9) 51 #define RDCEIEN BIT(8) 52 #define WRCEIEN BIT(7) 53 #define DISEIEN BIT(6) 54 #define LENEIEN BIT(5) 55 #define LITEIEN BIT(4) 56 #define SQMEIEN BIT(3) 57 #define SLCIEN BIT(2) 58 #define HDEIEN BIT(1) 59 #define DSIEN BIT(0) 60 61 #define DECOM_STOP BIT(0) 62 #define DECOM_COMPLETE BIT(0) 63 #define DECOM_GZIP_MODE BIT(4) 64 #define DECOM_ZLIB_MODE BIT(5) 65 #define DECOM_DEFLATE_MODE BIT(0) 66 67 #define DECOM_ENABLE 0x1 68 #define DECOM_DISABLE 0x0 69 70 #define DECOM_IRQ 0xffff /* fixme */ 71 72 #define DECOM_INT_MASK \ 73 (DSOLIEN | ZDICTEIEN | GCMEIEN | GIDEIEN | \ 74 CCCEIEN | BCCEIEN | HCCEIEN | CSEIEN | \ 75 DICTEIEN | VNEIEN | WNEIEN | RDCEIEN | WRCEIEN | \ 76 DISEIEN | LENEIEN | LITEIEN | SQMEIEN | SLCIEN | \ 77 HDEIEN | DSIEN) 78 79 struct rockchip_decom_priv { 80 void __iomem *base; 81 unsigned long soft_reset_base; 82 bool done; 83 }; 84 85 static int rockchip_decom_start(struct udevice *dev, void *buf) 86 { 87 struct rockchip_decom_priv *priv = dev_get_priv(dev); 88 struct decom_param *param = (struct decom_param *)buf; 89 90 priv->done = false; 91 92 writel(0x00800080, priv->soft_reset_base); 93 writel(0x00800000, priv->soft_reset_base); 94 95 if (param->mode == LZ4_MOD) 96 writel(LZ4_CONT_CSUM_CHECK_EN | 97 LZ4_HEAD_CSUM_CHECK_EN | 98 LZ4_BLOCK_CSUM_CHECK_EN | 99 LZ4_MOD, priv->base + DECOM_CTRL); 100 101 if (param->mode == GZIP_MOD) 102 writel(DECOM_DEFLATE_MODE | DECOM_GZIP_MODE, 103 priv->base + DECOM_CTRL); 104 105 if (param->mode == ZLIB_MOD) 106 writel(DECOM_DEFLATE_MODE | DECOM_ZLIB_MODE, 107 priv->base + DECOM_CTRL); 108 109 writel(param->addr_src, priv->base + DECOM_RADDR); 110 writel(param->addr_dst, priv->base + DECOM_WADDR); 111 112 writel(DECOM_INT_MASK, priv->base + DECOM_IEN); 113 writel(DECOM_ENABLE, priv->base + DECOM_ENR); 114 115 return 0; 116 } 117 118 static int rockchip_decom_stop(struct udevice *dev) 119 { 120 struct rockchip_decom_priv *priv = dev_get_priv(dev); 121 int irq_status; 122 123 irq_status = readl(priv->base + DECOM_ISR); 124 /* clear interrupts */ 125 if (irq_status) 126 writel(irq_status, priv->base + DECOM_ISR); 127 128 writel(DECOM_DISABLE, priv->base + DECOM_ENR); 129 130 return 0; 131 } 132 133 /* Caller must call this function to check if decompress done */ 134 static int rockchip_decom_done_poll(struct udevice *dev) 135 { 136 struct rockchip_decom_priv *priv = dev_get_priv(dev); 137 int decom_status; 138 139 decom_status = readl(priv->base + DECOM_STAT); 140 if (decom_status & DECOM_COMPLETE) 141 return 0; 142 143 return -EINVAL; 144 } 145 146 static int rockchip_decom_ability(void) 147 { 148 return GZIP_MOD; 149 } 150 151 /* Caller must fill in param @buf which represent struct decom_param */ 152 static int rockchip_decom_ioctl(struct udevice *dev, unsigned long request, 153 void *buf) 154 { 155 int ret = -EINVAL; 156 157 switch (request) { 158 case IOCTL_REQ_START: 159 ret = rockchip_decom_start(dev, buf); 160 break; 161 case IOCTL_REQ_POLL: 162 ret = rockchip_decom_done_poll(dev); 163 break; 164 case IOCTL_REQ_STOP: 165 ret = rockchip_decom_stop(dev); 166 break; 167 case IOCTL_REQ_CAPABILITY: 168 ret = rockchip_decom_ability(); 169 } 170 171 return ret; 172 } 173 174 static const struct misc_ops rockchip_decom_ops = { 175 .ioctl = rockchip_decom_ioctl, 176 }; 177 178 static int rockchip_decom_ofdata_to_platdata(struct udevice *dev) 179 { 180 struct rockchip_decom_priv *priv = dev_get_priv(dev); 181 182 priv->base = dev_read_addr_ptr(dev); 183 if (!priv->base) 184 return -ENOENT; 185 186 priv->soft_reset_base = dev_read_u32_default(dev, "soft-reset-addr", 0) 187 & 0xffffffff; 188 189 return 0; 190 } 191 192 #ifndef CONFIG_SPL_BUILD 193 static void rockchip_decom_irqhandler(int irq, void *data) 194 { 195 struct udevice *dev = data; 196 struct rockchip_decom_priv *priv = dev_get_priv(dev); 197 int irq_status; 198 int decom_status; 199 200 irq_status = readl(priv->base + DECOM_ISR); 201 /* clear interrupts */ 202 writel(irq_status, priv->base + DECOM_ISR); 203 if (irq_status & DECOM_STOP) { 204 decom_status = readl(priv->base + DECOM_STAT); 205 if (decom_status & DECOM_COMPLETE) { 206 priv->done = true; 207 /* 208 * TODO: 209 * Inform someone that decompress completed 210 */ 211 printf("decom completed\n"); 212 } else { 213 printf("decom failed, irq_status = 0x%x, decom_status = 0x%x\n", 214 irq_status, decom_status); 215 } 216 } 217 } 218 #endif 219 220 static int rockchip_decom_probe(struct udevice *dev) 221 { 222 #ifndef CONFIG_SPL_BUILD 223 irq_install_handler(DECOM_IRQ, rockchip_decom_irqhandler, dev); 224 irq_handler_enable(DECOM_IRQ); 225 #endif 226 return 0; 227 } 228 229 static const struct udevice_id rockchip_decom_ids[] = { 230 { .compatible = "rockchip,hw-decompress" }, 231 {} 232 }; 233 234 U_BOOT_DRIVER(rockchip_hw_decompress) = { 235 .name = "rockchip_hw_decompress", 236 .id = UCLASS_MISC, 237 .of_match = rockchip_decom_ids, 238 .probe = rockchip_decom_probe, 239 .ofdata_to_platdata = rockchip_decom_ofdata_to_platdata, 240 .priv_auto_alloc_size = sizeof(struct rockchip_decom_priv), 241 .ops = &rockchip_decom_ops, 242 }; 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