1 /* 2 * Copyright (c) 2012-2013, NVIDIA Corporation. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 9 #include <linux/clk.h> 10 11 #include "drm.h" 12 #include "gem.h" 13 #include "gr2d.h" 14 15 struct gr2d { 16 struct tegra_drm_client client; 17 struct host1x_channel *channel; 18 struct clk *clk; 19 20 DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS); 21 }; 22 23 static inline struct gr2d *to_gr2d(struct tegra_drm_client *client) 24 { 25 return container_of(client, struct gr2d, client); 26 } 27 28 static int gr2d_init(struct host1x_client *client) 29 { 30 struct tegra_drm_client *drm = host1x_to_drm_client(client); 31 struct drm_device *dev = dev_get_drvdata(client->parent); 32 unsigned long flags = HOST1X_SYNCPT_HAS_BASE; 33 struct gr2d *gr2d = to_gr2d(drm); 34 35 gr2d->channel = host1x_channel_request(client->dev); 36 if (!gr2d->channel) 37 return -ENOMEM; 38 39 client->syncpts[0] = host1x_syncpt_request(client, flags); 40 if (!client->syncpts[0]) { 41 host1x_channel_put(gr2d->channel); 42 return -ENOMEM; 43 } 44 45 return tegra_drm_register_client(dev->dev_private, drm); 46 } 47 48 static int gr2d_exit(struct host1x_client *client) 49 { 50 struct tegra_drm_client *drm = host1x_to_drm_client(client); 51 struct drm_device *dev = dev_get_drvdata(client->parent); 52 struct gr2d *gr2d = to_gr2d(drm); 53 int err; 54 55 err = tegra_drm_unregister_client(dev->dev_private, drm); 56 if (err < 0) 57 return err; 58 59 host1x_syncpt_free(client->syncpts[0]); 60 host1x_channel_put(gr2d->channel); 61 62 return 0; 63 } 64 65 static const struct host1x_client_ops gr2d_client_ops = { 66 .init = gr2d_init, 67 .exit = gr2d_exit, 68 }; 69 70 static int gr2d_open_channel(struct tegra_drm_client *client, 71 struct tegra_drm_context *context) 72 { 73 struct gr2d *gr2d = to_gr2d(client); 74 75 context->channel = host1x_channel_get(gr2d->channel); 76 if (!context->channel) 77 return -ENOMEM; 78 79 return 0; 80 } 81 82 static void gr2d_close_channel(struct tegra_drm_context *context) 83 { 84 host1x_channel_put(context->channel); 85 } 86 87 static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset) 88 { 89 struct gr2d *gr2d = dev_get_drvdata(dev); 90 91 switch (class) { 92 case HOST1X_CLASS_HOST1X: 93 if (offset == 0x2b) 94 return 1; 95 96 break; 97 98 case HOST1X_CLASS_GR2D: 99 case HOST1X_CLASS_GR2D_SB: 100 if (offset >= GR2D_NUM_REGS) 101 break; 102 103 if (test_bit(offset, gr2d->addr_regs)) 104 return 1; 105 106 break; 107 } 108 109 return 0; 110 } 111 112 static int gr2d_is_valid_class(u32 class) 113 { 114 return (class == HOST1X_CLASS_GR2D || 115 class == HOST1X_CLASS_GR2D_SB); 116 } 117 118 static const struct tegra_drm_client_ops gr2d_ops = { 119 .open_channel = gr2d_open_channel, 120 .close_channel = gr2d_close_channel, 121 .is_addr_reg = gr2d_is_addr_reg, 122 .is_valid_class = gr2d_is_valid_class, 123 .submit = tegra_drm_submit, 124 }; 125 126 static const struct of_device_id gr2d_match[] = { 127 { .compatible = "nvidia,tegra30-gr2d" }, 128 { .compatible = "nvidia,tegra20-gr2d" }, 129 { }, 130 }; 131 MODULE_DEVICE_TABLE(of, gr2d_match); 132 133 static const u32 gr2d_addr_regs[] = { 134 GR2D_UA_BASE_ADDR, 135 GR2D_VA_BASE_ADDR, 136 GR2D_PAT_BASE_ADDR, 137 GR2D_DSTA_BASE_ADDR, 138 GR2D_DSTB_BASE_ADDR, 139 GR2D_DSTC_BASE_ADDR, 140 GR2D_SRCA_BASE_ADDR, 141 GR2D_SRCB_BASE_ADDR, 142 GR2D_SRC_BASE_ADDR_SB, 143 GR2D_DSTA_BASE_ADDR_SB, 144 GR2D_DSTB_BASE_ADDR_SB, 145 GR2D_UA_BASE_ADDR_SB, 146 GR2D_VA_BASE_ADDR_SB, 147 }; 148 149 static int gr2d_probe(struct platform_device *pdev) 150 { 151 struct device *dev = &pdev->dev; 152 struct host1x_syncpt **syncpts; 153 struct gr2d *gr2d; 154 unsigned int i; 155 int err; 156 157 gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL); 158 if (!gr2d) 159 return -ENOMEM; 160 161 syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL); 162 if (!syncpts) 163 return -ENOMEM; 164 165 gr2d->clk = devm_clk_get(dev, NULL); 166 if (IS_ERR(gr2d->clk)) { 167 dev_err(dev, "cannot get clock\n"); 168 return PTR_ERR(gr2d->clk); 169 } 170 171 err = clk_prepare_enable(gr2d->clk); 172 if (err) { 173 dev_err(dev, "cannot turn on clock\n"); 174 return err; 175 } 176 177 INIT_LIST_HEAD(&gr2d->client.base.list); 178 gr2d->client.base.ops = &gr2d_client_ops; 179 gr2d->client.base.dev = dev; 180 gr2d->client.base.class = HOST1X_CLASS_GR2D; 181 gr2d->client.base.syncpts = syncpts; 182 gr2d->client.base.num_syncpts = 1; 183 184 INIT_LIST_HEAD(&gr2d->client.list); 185 gr2d->client.ops = &gr2d_ops; 186 187 err = host1x_client_register(&gr2d->client.base); 188 if (err < 0) { 189 dev_err(dev, "failed to register host1x client: %d\n", err); 190 clk_disable_unprepare(gr2d->clk); 191 return err; 192 } 193 194 /* initialize address register map */ 195 for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++) 196 set_bit(gr2d_addr_regs[i], gr2d->addr_regs); 197 198 platform_set_drvdata(pdev, gr2d); 199 200 return 0; 201 } 202 203 static int gr2d_remove(struct platform_device *pdev) 204 { 205 struct gr2d *gr2d = platform_get_drvdata(pdev); 206 int err; 207 208 err = host1x_client_unregister(&gr2d->client.base); 209 if (err < 0) { 210 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n", 211 err); 212 return err; 213 } 214 215 clk_disable_unprepare(gr2d->clk); 216 217 return 0; 218 } 219 220 struct platform_driver tegra_gr2d_driver = { 221 .driver = { 222 .name = "tegra-gr2d", 223 .of_match_table = gr2d_match, 224 }, 225 .probe = gr2d_probe, 226 .remove = gr2d_remove, 227 }; 228