Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2017 Linaro Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Author: Linus Walleij <linus.walleij@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * This program is free software; you can redistribute it and/or modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * it under the terms of the GNU General Public License version 2, as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * published by the Free Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mfd/syscon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define GLOBAL_WORD_ID				0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define GEMINI_GLOBAL_ARB1_CTRL			0x2c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define GEMINI_ARB1_BURST_MASK			GENMASK(21, 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define GEMINI_ARB1_BURST_SHIFT			16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /* These all define the priority on the BUS2 backplane */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define GEMINI_ARB1_PRIO_MASK			GENMASK(9, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define GEMINI_ARB1_DMAC_HIGH_PRIO		BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define GEMINI_ARB1_IDE_HIGH_PRIO		BIT(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define GEMINI_ARB1_RAID_HIGH_PRIO		BIT(2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define GEMINI_ARB1_SECURITY_HIGH_PRIO		BIT(3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define GEMINI_ARB1_GMAC0_HIGH_PRIO		BIT(4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define GEMINI_ARB1_GMAC1_HIGH_PRIO		BIT(5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define GEMINI_ARB1_USB0_HIGH_PRIO		BIT(6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define GEMINI_ARB1_USB1_HIGH_PRIO		BIT(7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define GEMINI_ARB1_PCI_HIGH_PRIO		BIT(8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define GEMINI_ARB1_TVE_HIGH_PRIO		BIT(9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define GEMINI_DEFAULT_BURST_SIZE		0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define GEMINI_DEFAULT_PRIO			(GEMINI_ARB1_GMAC0_HIGH_PRIO | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 						 GEMINI_ARB1_GMAC1_HIGH_PRIO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static int __init gemini_soc_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	struct regmap *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	u32 rev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	u32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	/* Multiplatform guard, only proceed on Gemini */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	if (!of_machine_is_compatible("cortina,gemini"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	map = syscon_regmap_lookup_by_compatible("cortina,gemini-syscon");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	if (IS_ERR(map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		return PTR_ERR(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	ret = regmap_read(map, GLOBAL_WORD_ID, &rev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	val = (GEMINI_DEFAULT_BURST_SIZE << GEMINI_ARB1_BURST_SHIFT) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		GEMINI_DEFAULT_PRIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	/* Set up system arbitration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	regmap_update_bits(map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 			   GEMINI_GLOBAL_ARB1_CTRL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 			   GEMINI_ARB1_BURST_MASK | GEMINI_ARB1_PRIO_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 			   val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	pr_info("Gemini SoC %04x revision %02x, set arbitration %08x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 		rev >> 8, rev & 0xff, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) subsys_initcall(gemini_soc_init);