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 tegra_drm *tegra = 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->dev, flags); 40 if (!client->syncpts[0]) { 41 host1x_channel_free(gr2d->channel); 42 return -ENOMEM; 43 } 44 45 return tegra_drm_register_client(tegra, 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 tegra_drm *tegra = dev_get_drvdata(client->parent); 52 struct gr2d *gr2d = to_gr2d(drm); 53 int err; 54 55 err = tegra_drm_unregister_client(tegra, drm); 56 if (err < 0) 57 return err; 58 59 host1x_syncpt_free(client->syncpts[0]); 60 host1x_channel_free(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 const struct tegra_drm_client_ops gr2d_ops = { 113 .open_channel = gr2d_open_channel, 114 .close_channel = gr2d_close_channel, 115 .is_addr_reg = gr2d_is_addr_reg, 116 .submit = tegra_drm_submit, 117 }; 118 119 static const struct of_device_id gr2d_match[] = { 120 { .compatible = "nvidia,tegra30-gr2d" }, 121 { .compatible = "nvidia,tegra20-gr2d" }, 122 { }, 123 }; 124 125 static const u32 gr2d_addr_regs[] = { 126 GR2D_UA_BASE_ADDR, 127 GR2D_VA_BASE_ADDR, 128 GR2D_PAT_BASE_ADDR, 129 GR2D_DSTA_BASE_ADDR, 130 GR2D_DSTB_BASE_ADDR, 131 GR2D_DSTC_BASE_ADDR, 132 GR2D_SRCA_BASE_ADDR, 133 GR2D_SRCB_BASE_ADDR, 134 GR2D_SRC_BASE_ADDR_SB, 135 GR2D_DSTA_BASE_ADDR_SB, 136 GR2D_DSTB_BASE_ADDR_SB, 137 GR2D_UA_BASE_ADDR_SB, 138 GR2D_VA_BASE_ADDR_SB, 139 }; 140 141 static int gr2d_probe(struct platform_device *pdev) 142 { 143 struct device *dev = &pdev->dev; 144 struct host1x_syncpt **syncpts; 145 struct gr2d *gr2d; 146 unsigned int i; 147 int err; 148 149 gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL); 150 if (!gr2d) 151 return -ENOMEM; 152 153 syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL); 154 if (!syncpts) 155 return -ENOMEM; 156 157 gr2d->clk = devm_clk_get(dev, NULL); 158 if (IS_ERR(gr2d->clk)) { 159 dev_err(dev, "cannot get clock\n"); 160 return PTR_ERR(gr2d->clk); 161 } 162 163 err = clk_prepare_enable(gr2d->clk); 164 if (err) { 165 dev_err(dev, "cannot turn on clock\n"); 166 return err; 167 } 168 169 INIT_LIST_HEAD(&gr2d->client.base.list); 170 gr2d->client.base.ops = &gr2d_client_ops; 171 gr2d->client.base.dev = dev; 172 gr2d->client.base.class = HOST1X_CLASS_GR2D; 173 gr2d->client.base.syncpts = syncpts; 174 gr2d->client.base.num_syncpts = 1; 175 176 INIT_LIST_HEAD(&gr2d->client.list); 177 gr2d->client.ops = &gr2d_ops; 178 179 err = host1x_client_register(&gr2d->client.base); 180 if (err < 0) { 181 dev_err(dev, "failed to register host1x client: %d\n", err); 182 clk_disable_unprepare(gr2d->clk); 183 return err; 184 } 185 186 /* initialize address register map */ 187 for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++) 188 set_bit(gr2d_addr_regs[i], gr2d->addr_regs); 189 190 platform_set_drvdata(pdev, gr2d); 191 192 return 0; 193 } 194 195 static int gr2d_remove(struct platform_device *pdev) 196 { 197 struct gr2d *gr2d = platform_get_drvdata(pdev); 198 int err; 199 200 err = host1x_client_unregister(&gr2d->client.base); 201 if (err < 0) { 202 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n", 203 err); 204 return err; 205 } 206 207 clk_disable_unprepare(gr2d->clk); 208 209 return 0; 210 } 211 212 struct platform_driver tegra_gr2d_driver = { 213 .driver = { 214 .name = "tegra-gr2d", 215 .of_match_table = gr2d_match, 216 }, 217 .probe = gr2d_probe, 218 .remove = gr2d_remove, 219 }; 220