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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * linux/arch/arm/mach-pxa/pxa2xx.c
- *
- * code specific to pxa2xx
- *
- * Copyright (C) 2008 Dmitry Baryshkov
- */
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/device.h>
- #include <linux/io.h>
- #include "pxa2xx-regs.h"
- #include "mfp-pxa25x.h"
- #include "generic.h"
- #include "reset.h"
- #include "smemc.h"
- #include <linux/soc/pxa/smemc.h>
- #include <linux/platform_data/irda-pxaficp.h>
- void pxa2xx_clear_reset_status(unsigned int mask)
- {
- /* RESET_STATUS_* has a 1:1 mapping with RCSR */
- RCSR = mask;
- }
- static unsigned long pxa2xx_mfp_fir[] = {
- GPIO46_FICP_RXD,
- GPIO47_FICP_TXD,
- };
- static unsigned long pxa2xx_mfp_sir[] = {
- GPIO46_STUART_RXD,
- GPIO47_STUART_TXD,
- };
- static unsigned long pxa2xx_mfp_off[] = {
- GPIO46_GPIO | MFP_LPM_DRIVE_LOW,
- GPIO47_GPIO | MFP_LPM_DRIVE_LOW,
- };
- void pxa2xx_transceiver_mode(struct device *dev, int mode)
- {
- if (mode & IR_OFF) {
- pxa2xx_mfp_config(pxa2xx_mfp_off, ARRAY_SIZE(pxa2xx_mfp_off));
- } else if (mode & IR_SIRMODE) {
- pxa2xx_mfp_config(pxa2xx_mfp_sir, ARRAY_SIZE(pxa2xx_mfp_sir));
- } else if (mode & IR_FIRMODE) {
- pxa2xx_mfp_config(pxa2xx_mfp_fir, ARRAY_SIZE(pxa2xx_mfp_fir));
- } else
- BUG();
- }
- EXPORT_SYMBOL_GPL(pxa2xx_transceiver_mode);
- #define MDCNFG_DRAC2(mdcnfg) (((mdcnfg) >> 21) & 0x3)
- #define MDCNFG_DRAC0(mdcnfg) (((mdcnfg) >> 5) & 0x3)
- int pxa2xx_smemc_get_sdram_rows(void)
- {
- static int sdram_rows;
- unsigned int drac2 = 0, drac0 = 0;
- u32 mdcnfg;
- if (sdram_rows)
- return sdram_rows;
- mdcnfg = readl_relaxed(MDCNFG);
- if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
- drac2 = MDCNFG_DRAC2(mdcnfg);
- if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1))
- drac0 = MDCNFG_DRAC0(mdcnfg);
- sdram_rows = 1 << (11 + max(drac0, drac2));
- return sdram_rows;
- }
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