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 <irq-generic.h> 11 12 DECLARE_GLOBAL_DATA_PTR; 13 14 #define DECOM_CTRL 0x0 15 #define DECOM_ENR 0x4 16 #define DECOM_RADDR 0x8 17 #define DECOM_WADDR 0xc 18 #define DECOM_UDDSL 0x10 19 #define DECOM_UDDSH 0x14 20 #define DECOM_TXTHR 0x18 21 #define DECOM_RXTHR 0x1c 22 #define DECOM_SLEN 0x20 23 #define DECOM_STAT 0x24 24 #define DECOM_ISR 0x28 25 #define DECOM_IEN 0x2c 26 #define DECOM_AXI_STAT 0x30 27 #define DECOM_TSIZEL 0x34 28 #define DECOM_TSIZEH 0x38 29 #define DECOM_MGNUM 0x3c 30 #define DECOM_FRAME 0x40 31 #define DECOM_DICTID 0x44 32 #define DECOM_CSL 0x48 33 #define DECOM_CSH 0x4c 34 35 #define LZ4_HEAD_CSUM_CHECK_EN BIT(1) 36 #define LZ4_BLOCK_CSUM_CHECK_EN BIT(2) 37 #define LZ4_CONT_CSUM_CHECK_EN BIT(3) 38 39 #define DSOLIEN BIT(19) 40 #define ZDICTEIEN BIT(18) 41 #define GCMEIEN BIT(17) 42 #define GIDEIEN BIT(16) 43 #define CCCEIEN BIT(15) 44 #define BCCEIEN BIT(14) 45 #define HCCEIEN BIT(13) 46 #define CSEIEN BIT(12) 47 #define DICTEIEN BIT(11) 48 #define VNEIEN BIT(10) 49 #define WNEIEN BIT(9) 50 #define RDCEIEN BIT(8) 51 #define WRCEIEN BIT(7) 52 #define DISEIEN BIT(6) 53 #define LENEIEN BIT(5) 54 #define LITEIEN BIT(4) 55 #define SQMEIEN BIT(3) 56 #define SLCIEN BIT(2) 57 #define HDEIEN BIT(1) 58 #define DSIEN BIT(0) 59 60 #define DECOM_STOP BIT(0) 61 #define DECOM_COMPLETE BIT(0) 62 #define DECOM_GZIP_MODE BIT(4) 63 #define DECOM_ZLIB_MODE BIT(5) 64 #define DECOM_DEFLATE_MODE BIT(0) 65 #define DECOM_LZ4_MODE 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 == DECOM_LZ4) 96 writel(LZ4_CONT_CSUM_CHECK_EN | 97 LZ4_HEAD_CSUM_CHECK_EN | 98 LZ4_BLOCK_CSUM_CHECK_EN | 99 DECOM_LZ4_MODE, priv->base + DECOM_CTRL); 100 101 if (param->mode == DECOM_GZIP) 102 writel(DECOM_DEFLATE_MODE | DECOM_GZIP_MODE, 103 priv->base + DECOM_CTRL); 104 105 if (param->mode == DECOM_ZLIB) 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_capability(u32 *buf) 147 { 148 *buf = DECOM_GZIP; 149 150 return 0; 151 } 152 153 /* Caller must fill in param @buf which represent struct decom_param */ 154 static int rockchip_decom_ioctl(struct udevice *dev, unsigned long request, 155 void *buf) 156 { 157 int ret = -EINVAL; 158 159 switch (request) { 160 case IOCTL_REQ_START: 161 ret = rockchip_decom_start(dev, buf); 162 break; 163 case IOCTL_REQ_POLL: 164 ret = rockchip_decom_done_poll(dev); 165 break; 166 case IOCTL_REQ_STOP: 167 ret = rockchip_decom_stop(dev); 168 break; 169 case IOCTL_REQ_CAPABILITY: 170 ret = rockchip_decom_capability(buf); 171 } 172 173 return ret; 174 } 175 176 static const struct misc_ops rockchip_decom_ops = { 177 .ioctl = rockchip_decom_ioctl, 178 }; 179 180 static int rockchip_decom_ofdata_to_platdata(struct udevice *dev) 181 { 182 struct rockchip_decom_priv *priv = dev_get_priv(dev); 183 184 priv->base = dev_read_addr_ptr(dev); 185 if (!priv->base) 186 return -ENOENT; 187 188 priv->soft_reset_base = dev_read_u32_default(dev, "soft-reset-addr", 0) 189 & 0xffffffff; 190 191 return 0; 192 } 193 194 #ifndef CONFIG_SPL_BUILD 195 static void rockchip_decom_irqhandler(int irq, void *data) 196 { 197 struct udevice *dev = data; 198 struct rockchip_decom_priv *priv = dev_get_priv(dev); 199 int irq_status; 200 int decom_status; 201 202 irq_status = readl(priv->base + DECOM_ISR); 203 /* clear interrupts */ 204 writel(irq_status, priv->base + DECOM_ISR); 205 if (irq_status & DECOM_STOP) { 206 decom_status = readl(priv->base + DECOM_STAT); 207 if (decom_status & DECOM_COMPLETE) { 208 priv->done = true; 209 /* 210 * TODO: 211 * Inform someone that decompress completed 212 */ 213 printf("decom completed\n"); 214 } else { 215 printf("decom failed, irq_status = 0x%x, decom_status = 0x%x\n", 216 irq_status, decom_status); 217 } 218 } 219 } 220 #endif 221 222 static int rockchip_decom_probe(struct udevice *dev) 223 { 224 #ifndef CONFIG_SPL_BUILD 225 irq_install_handler(DECOM_IRQ, rockchip_decom_irqhandler, dev); 226 irq_handler_enable(DECOM_IRQ); 227 #endif 228 return 0; 229 } 230 231 static const struct udevice_id rockchip_decom_ids[] = { 232 { .compatible = "rockchip,hw-decompress" }, 233 {} 234 }; 235 236 U_BOOT_DRIVER(rockchip_hw_decompress) = { 237 .name = "rockchip_hw_decompress", 238 .id = UCLASS_MISC, 239 .of_match = rockchip_decom_ids, 240 .probe = rockchip_decom_probe, 241 .ofdata_to_platdata = rockchip_decom_ofdata_to_platdata, 242 .priv_auto_alloc_size = sizeof(struct rockchip_decom_priv), 243 .ops = &rockchip_decom_ops, 244 }; 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