2  * Amlogic Secure Monitor driver
15 #define pr_fmt(fmt) "meson-sm: " fmt
17 #include <linux/arm-smccc.h>
66 	const struct meson_sm_cmd *cmd = chip->cmd;  in meson_sm_get_cmd()
68 	while (cmd->smc_id && cmd->index != cmd_index)  in meson_sm_get_cmd()
71 	return cmd->smc_id;  in meson_sm_get_cmd()
95  * meson_sm_call - generic SMC32 call to the secure-monitor
113 		return -ENOENT;  in meson_sm_call()
117 		return -EINVAL;  in meson_sm_call()
129  * meson_sm_call_read - retrieve data from secure-monitor
151 		return -ENOENT;  in meson_sm_call_read()
153 	if (!fw.chip->cmd_shmem_out_base)  in meson_sm_call_read()
154 		return -EINVAL;  in meson_sm_call_read()
156 	if (bsize > fw.chip->shmem_size)  in meson_sm_call_read()
157 		return -EINVAL;  in meson_sm_call_read()
160 		return -EINVAL;  in meson_sm_call_read()
163 		return -EINVAL;  in meson_sm_call_read()
178  * meson_sm_call_write - send data to secure-monitor
197 		return -ENOENT;  in meson_sm_call_write()
199 	if (size > fw.chip->shmem_size)  in meson_sm_call_write()
200 		return -EINVAL;  in meson_sm_call_write()
202 	if (!fw.chip->cmd_shmem_in_base)  in meson_sm_call_write()
203 		return -EINVAL;  in meson_sm_call_write()
208 		return -EINVAL;  in meson_sm_call_write()
211 		return -EINVAL;  in meson_sm_call_write()
218 	{ .compatible = "amlogic,meson-gxbb-sm", .data = &gxbb_chip },
226 	chip = of_match_device(meson_sm_ids, &pdev->dev)->data;  in meson_sm_probe()
228 	if (chip->cmd_shmem_in_base) {  in meson_sm_probe()
229 		fw.sm_shmem_in_base = meson_sm_map_shmem(chip->cmd_shmem_in_base,  in meson_sm_probe()
230 							 chip->shmem_size);  in meson_sm_probe()
235 	if (chip->cmd_shmem_out_base) {  in meson_sm_probe()
236 		fw.sm_shmem_out_base = meson_sm_map_shmem(chip->cmd_shmem_out_base,  in meson_sm_probe()
237 							  chip->shmem_size);  in meson_sm_probe()
243 	pr_info("secure-monitor enabled\n");  in meson_sm_probe()
250 	return -EINVAL;  in meson_sm_probe()
255 		.name = "meson-sm",