From cde9070d9970eef1f7ec2360586c802a16230ad8 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:43:50 +0000
Subject: [PATCH] rtl88x2CE_WiFi_linux driver

---
 kernel/drivers/net/wireless/rockchip_wlan/cywdhd/bcmdhd/bcmsdspi_linux.c |  423 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 414 insertions(+), 9 deletions(-)

diff --git a/kernel/drivers/net/wireless/rockchip_wlan/cywdhd/bcmdhd/bcmsdspi_linux.c b/kernel/drivers/net/wireless/rockchip_wlan/cywdhd/bcmdhd/bcmsdspi_linux.c
index 566a701..eef1190 100644
--- a/kernel/drivers/net/wireless/rockchip_wlan/cywdhd/bcmdhd/bcmsdspi_linux.c
+++ b/kernel/drivers/net/wireless/rockchip_wlan/cywdhd/bcmdhd/bcmsdspi_linux.c
@@ -1,15 +1,16 @@
-/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Broadcom SPI Host Controller Driver - Linux Per-port
  *
- * Copyright (C) 1999-2019, Broadcom Corporation
- * 
+ * Portions of this code are copyright (c) 2022 Cypress Semiconductor Corporation
+ *
+ * Copyright (C) 1999-2017, Broadcom Corporation
+ *
  *      Unless you and Broadcom execute a separate written software license
  * agreement governing use of this software, this software is licensed to you
  * under the terms of the GNU General Public License version 2 (the "GPL"),
  * available at http://www.broadcom.com/licenses/GPLv2.php, with the
  * following added to such license:
- * 
+ *
  *      As a special exception, the copyright holders of this software give you
  * permission to link this software with independent modules, and to copy and
  * distribute the resulting executable under terms of your choice, provided that
@@ -17,7 +18,7 @@
  * the license of that module.  An independent module is a module which is not
  * derived from this software.  The special exception does not apply to any
  * modifications of the software.
- * 
+ *
  *      Notwithstanding the above, under no circumstances may you combine this
  * software in any way with any other Broadcom software provided under a license
  * other than the GPL, without Broadcom's express prior written consent.
@@ -34,37 +35,257 @@
 #include <bcmsdbus.h>		/* bcmsdh to/from specific controller APIs */
 #include <sdiovar.h>		/* to get msglevel bit values */
 
+#ifdef BCMSPI_ANDROID
+#include <bcmsdh.h>
+#include <bcmspibrcm.h>
+#include <linux/spi/spi.h>
+#else
 #include <pcicfg.h>
 #include <sdio.h>		/* SDIO Device and Protocol Specs */
 #include <linux/sched.h>	/* request_irq(), free_irq() */
 #include <bcmsdspi.h>
+#include <bcmdevs.h>
 #include <bcmspi.h>
+#endif /* BCMSPI_ANDROID */
 
+#ifndef GSPIBCM
+#ifndef BCMSPI_ANDROID
 extern uint sd_crc;
 module_param(sd_crc, uint, 0);
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
 #define KERNEL26
-#endif
+#endif // endif
+#endif /* !BCMSPI_ANDROID */
 
 struct sdos_info {
 	sdioh_info_t *sd;
 	spinlock_t lock;
+#ifndef BCMSPI_ANDROID
 	wait_queue_head_t intr_wait_queue;
+#endif /* !BCMSPI_ANDROID */
 };
+#endif /* !GSPIBCM */
 
+#ifndef BCMSPI_ANDROID
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
 #define BLOCKABLE()	(!in_atomic())
 #else
 #define BLOCKABLE()	(!in_interrupt())
-#endif
+#endif // endif
 
+/* For Broadcom PCI-SPI Host controller (Raggedstone) */
+#if defined(BCMSPI) && (defined(BCMPCISPIHOST) || defined(GSPIBCM))
+#ifndef SDLX_MSG
+#define SDLX_MSG(x) printf x
+#endif // endif
+extern void* bcmsdh_probe(osl_t *osh, void *dev, void *sdioh, void *adapter_info,
+        uint bus_type, uint bus_num, uint slot_num);
+extern int bcmsdh_remove(bcmsdh_info_t *bcmsdh);
+extern sdioh_info_t * sdioh_attach(osl_t *osh, void *bar0, uint irq);
+extern SDIOH_API_RC sdioh_detach(osl_t *osh, sdioh_info_t *sd);
+
+/* forward declarations for PCI probe and remove functions. */
+static int __devinit bcmsdh_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
+static void __devexit bcmsdh_pci_remove(struct pci_dev *pdev);
+
+/* forward declarations for PCI probe and remove functions. */
+static int __devinit bcmsdh_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
+static void __devexit bcmsdh_pci_remove(struct pci_dev *pdev);
+
+/**
+ * pci id table
+ */
+static struct pci_device_id bcmsdh_pci_devid[] __devinitdata = {
+	{ vendor: PCI_ANY_ID,
+	device: PCI_ANY_ID,
+	subvendor: PCI_ANY_ID,
+	subdevice: PCI_ANY_ID,
+	class: 0,
+	class_mask: 0,
+	driver_data: 0,
+	},
+	{ 0, }
+};
+MODULE_DEVICE_TABLE(pci, bcmsdh_pci_devid);
+
+/**
+ * PCI-SPI Host Controller: pci driver info
+ */
+static struct pci_driver bcmsdh_pci_driver = {
+	node:       {},
+	name:       "bcmsdh",
+	id_table:   bcmsdh_pci_devid,
+	probe:      bcmsdh_pci_probe,
+	remove:     bcmsdh_pci_remove,
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
+	save_state: NULL,
+#endif // endif
+	suspend:    NULL,
+	resume:     NULL,
+};
+
+/* Force detection to a particular PCI */
+/* slot only . Allows for having multiple */
+/* WL devices at once in a PC */
+/* Only one instance of dhd will be */
+/* usable at a time */
+/* Upper word is bus number, */
+/* lower word is slot number */
+/* Default value of 0xffffffff turns this off */
+extern uint sd_pci_slot;
+module_param(sd_pci_slot, uint, 0);
+
+/**
+ * Detect supported Host Controller and attach if found.
+ *
+ * Determine if the device described by pdev is a supported PCI Host
+ * Controller.  If so, attach to it and attach to the target device.
+ */
+static int __devinit
+bcmsdh_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	osl_t *osh = NULL;
+	sdioh_info_t *sdioh = NULL;
+	void *bcmsdh;
+
+	int rc;
+
+	if (sd_pci_slot != 0xFFFFFFFF) {
+		if (pdev->bus->number != (sd_pci_slot>>16) ||
+				PCI_SLOT(pdev->devfn) != (sd_pci_slot&0xffff)) {
+			SDLX_MSG(("%s: %s: bus %X, slot %X, vend %X, dev %X\n",
+				__FUNCTION__,
+				bcmsdh_chipmatch(pdev->vendor, pdev->device)
+				?"Found compatible SDIOHC"
+				:"Probing unknown device",
+				pdev->bus->number, PCI_SLOT(pdev->devfn), pdev->vendor,
+				pdev->device));
+			return -ENODEV;
+		}
+		SDLX_MSG(("%s: %s: bus %X, slot %X, vendor %X, device %X (good PCI location)\n",
+			__FUNCTION__,
+			bcmsdh_chipmatch(pdev->vendor, pdev->device)
+			?"Using compatible SDIOHC"
+			:"WARNING, forced use of unkown device",
+			pdev->bus->number, PCI_SLOT(pdev->devfn), pdev->vendor, pdev->device));
+	}
+
+	if ((pdev->vendor == VENDOR_TI) && ((pdev->device == PCIXX21_FLASHMEDIA_ID) ||
+		(pdev->device == PCIXX21_FLASHMEDIA0_ID))) {
+		uint32 config_reg;
+
+		SDLX_MSG(("%s: Disabling TI FlashMedia Controller.\n", __FUNCTION__));
+		if (!(osh = osl_attach(pdev, PCI_BUS, FALSE))) {
+			SDLX_MSG(("%s: osl_attach failed\n", __FUNCTION__));
+			goto err;
+		}
+		config_reg = OSL_PCI_READ_CONFIG(osh, 0x4c, 4);
+
+		/*
+		 * Set MMC_SD_DIS bit in FlashMedia Controller.
+		 * Disbling the SD/MMC Controller in the FlashMedia Controller
+		 * allows the Standard SD Host Controller to take over control
+		 * of the SD Slot.
+		 */
+		config_reg |= 0x02;
+		OSL_PCI_WRITE_CONFIG(osh, 0x4c, 4, config_reg);
+		osl_detach(osh);
+	}
+	/* match this pci device with what we support */
+	/* we can't solely rely on this to believe it is our SDIO Host Controller! */
+	if (!bcmsdh_chipmatch(pdev->vendor, pdev->device)) {
+		if (pdev->vendor == VENDOR_BROADCOM) {
+			SDLX_MSG(("%s: Unknown Broadcom device (vendor: %#x, device: %#x).\n",
+				__FUNCTION__, pdev->vendor, pdev->device));
+		}
+		return -ENODEV;
+	}
+
+	/* this is a pci device we might support */
+	SDLX_MSG(("%s: Found possible SDIO Host Controller: bus %d slot %d func %d irq %d\n",
+		__FUNCTION__,
+		pdev->bus->number, PCI_SLOT(pdev->devfn),
+		PCI_FUNC(pdev->devfn), pdev->irq));
+
+	/* use bcmsdh_query_device() to get the vendor ID of the target device so
+	 * it will eventually appear in the Broadcom string on the console
+	 */
+
+	/* allocate SDIO Host Controller state info */
+	if (!(osh = osl_attach(pdev, PCI_BUS, FALSE))) {
+		SDLX_MSG(("%s: osl_attach failed\n", __FUNCTION__));
+		goto err;
+	}
+
+	/* map to address where host can access */
+	pci_set_master(pdev);
+	rc = pci_enable_device(pdev);
+	if (rc) {
+		SDLX_MSG(("%s: Cannot enable PCI device\n", __FUNCTION__));
+		goto err;
+	}
+
+	if (!(sdioh = sdioh_attach(osh, (void *)(ulong)pci_resource_start(pdev, 0), pdev->irq))) {
+		SDLX_MSG(("%s: bcmsdh_attach failed\n", __FUNCTION__));
+		goto err;
+	}
+
+#ifdef GSPIBCM
+	bcmsdh = bcmsdh_probe(osh, &pdev->dev, sdioh, NULL, PCI_BUS, -1, -1);
+	if (bcmsdh == NULL) {
+#else
+	sdioh->bcmsdh = bcmsdh_probe(osh, &pdev->dev, sdioh, NULL, PCI_BUS, -1, -1);
+	if (sdioh->bcmsdh == NULL) {
+#endif /* GSPIBCM */
+		sd_err(("%s: bcmsdh_probe failed\n", __FUNCTION__));
+		goto err;
+	}
+
+	pci_set_drvdata(pdev, sdioh);
+	return 0;
+
+	/* error handling */
+err:
+	if (sdioh != NULL)
+		sdioh_detach(osh, sdioh);
+	if (osh != NULL)
+		osl_detach(osh);
+	return -ENOMEM;
+
+}
+
+/**
+ * Detach from target devices and PCI-SPI Host Controller
+ */
+static void __devexit
+bcmsdh_pci_remove(struct pci_dev *pdev)
+{
+
+	sdioh_info_t *sdioh = NULL;
+	osl_t *osh;
+
+	sdioh = pci_get_drvdata(pdev);
+	if (sdioh == NULL) {
+		sd_err(("%s: error, no sdh handler found\n", __FUNCTION__));
+		return;
+	}
+
+	osh = sdioh->osh;
+	bcmsdh_remove(sdioh->bcmsdh);
+	sdioh_detach(osh, sdioh);
+	osl_detach(osh);
+
+}
+#endif /* BCMSPI && BCMPCISPIHOST */
+
+#ifndef GSPIBCM
 /* Interrupt handler */
 static irqreturn_t
 sdspi_isr(int irq, void *dev_id
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
 , struct pt_regs *ptregs
-#endif
+#endif // endif
 )
 {
 	sdioh_info_t *sd;
@@ -89,17 +310,100 @@
 		return IRQ_RETVAL(ours);
 	}
 }
+#endif /* !GSPIBCM */
+#endif /* !BCMSPI_ANDROID */
 
+#ifdef BCMSPI_ANDROID
+static struct spi_device *gBCMSPI = NULL;
 
+extern int bcmsdh_probe(struct device *dev);
+extern int bcmsdh_remove(struct device *dev);
+
+static int bcmsdh_spi_probe(struct spi_device *spi_dev)
+{
+	int ret = 0;
+
+	gBCMSPI = spi_dev;
+
+#ifdef SPI_PIO_32BIT_RW
+	spi_dev->bits_per_word = 32;
+#else
+	spi_dev->bits_per_word = 8;
+#endif /* SPI_PIO_32BIT_RW */
+	ret = spi_setup(spi_dev);
+
+	if (ret) {
+		sd_err(("bcmsdh_spi_probe: spi_setup fail with %d\n", ret));
+	}
+	sd_err(("bcmsdh_spi_probe: spi_setup with %d, bits_per_word=%d\n",
+		ret, spi_dev->bits_per_word));
+	ret = bcmsdh_probe(&spi_dev->dev);
+
+	return ret;
+}
+
+static int  bcmsdh_spi_remove(struct spi_device *spi_dev)
+{
+	int ret = 0;
+
+	ret = bcmsdh_remove(&spi_dev->dev);
+	gBCMSPI = NULL;
+
+	return ret;
+}
+
+static struct spi_driver bcmsdh_spi_driver = {
+	.probe		= bcmsdh_spi_probe,
+	.remove		= bcmsdh_spi_remove,
+	.driver		= {
+		.name = "wlan_spi",
+		.bus    = &spi_bus_type,
+		.owner  = THIS_MODULE,
+		},
+};
+#endif /* BCMSPI_ANDROID */
+
+/*
+ * module init
+*/
+int bcmsdh_register_client_driver(void)
+{
+	int error = 0;
+	sd_trace(("bcmsdh_gspi: %s Enter\n", __FUNCTION__));
+#if defined(BCMSPI) && (defined(BCMPCISPIHOST) || defined(GSPIBCM))
+	error = pci_module_init(&bcmsdh_pci_driver);
+#else
+	error = spi_register_driver(&bcmsdh_spi_driver);
+#endif /* BCMSPI && BCMPCISPIHOST */
+
+	return error;
+}
+
+/*
+ * module cleanup
+*/
+void bcmsdh_unregister_client_driver(void)
+{
+	sd_trace(("%s Enter\n", __FUNCTION__));
+#if defined(BCMSPI) && (defined(BCMPCISPIHOST) || defined(GSPIBCM))
+	pci_unregister_driver(&bcmsdh_pci_driver);
+#else
+	spi_unregister_driver(&bcmsdh_spi_driver);
+#endif /* BCMSPI && BCMPCISPIHOST */
+}
+
+#ifndef GSPIBCM
 /* Register with Linux for interrupts */
 int
 spi_register_irq(sdioh_info_t *sd, uint irq)
 {
+#ifndef BCMSPI_ANDROID
 	sd_trace(("Entering %s: irq == %d\n", __FUNCTION__, irq));
 	if (request_irq(irq, sdspi_isr, IRQF_SHARED, "bcmsdspi", sd) < 0) {
 		sd_err(("%s: request_irq() failed\n", __FUNCTION__));
 		return ERROR;
 	}
+#endif /* !BCMSPI_ANDROID */
 	return SUCCESS;
 }
 
@@ -107,10 +411,13 @@
 void
 spi_free_irq(uint irq, sdioh_info_t *sd)
 {
+#ifndef BCMSPI_ANDROID
 	free_irq(irq, sd);
+#endif /* !BCMSPI_ANDROID */
 }
 
 /* Map Host controller registers */
+#ifndef BCMSPI_ANDROID
 uint32 *
 spi_reg_map(osl_t *osh, uintptr addr, int size)
 {
@@ -122,6 +429,7 @@
 {
 	REG_UNMAP((void*)(uintptr)addr);
 }
+#endif /* !BCMSPI_ANDROID */
 
 int
 spi_osinit(sdioh_info_t *sd)
@@ -135,7 +443,9 @@
 
 	sdos->sd = sd;
 	spin_lock_init(&sdos->lock);
+#ifndef BCMSPI_ANDROID
 	init_waitqueue_head(&sdos->intr_wait_queue);
+#endif /* !BCMSPI_ANDROID */
 	return BCME_OK;
 }
 
@@ -166,19 +476,23 @@
 		return SDIOH_API_RC_FAIL;
 	}
 
+#ifndef BCMSPI_ANDROID
 	if (enable && !(sd->intr_handler && sd->intr_handler_arg)) {
 		sd_err(("%s: no handler registered, will not enable\n", __FUNCTION__));
 		return SDIOH_API_RC_FAIL;
 	}
+#endif /* !BCMSPI_ANDROID */
 
 	/* Ensure atomicity for enable/disable calls */
 	spin_lock_irqsave(&sdos->lock, flags);
 
 	sd->client_intr_enabled = enable;
+#ifndef BCMSPI_ANDROID
 	if (enable && !sd->lockcount)
 		spi_devintr_on(sd);
 	else
 		spi_devintr_off(sd);
+#endif /* !BCMSPI_ANDROID */
 
 	spin_unlock_irqrestore(&sdos->lock, flags);
 
@@ -202,7 +516,12 @@
 		sd_err(("%s: Already locked!\n", __FUNCTION__));
 		ASSERT(sd->lockcount == 0);
 	}
+#ifdef BCMSPI_ANDROID
+	if (sd->client_intr_enabled)
+		bcmsdh_oob_intr_set(0);
+#else
 	spi_devintr_off(sd);
+#endif /* BCMSPI_ANDROID */
 	sd->lockcount++;
 	spin_unlock_irqrestore(&sdos->lock, flags);
 }
@@ -222,16 +541,21 @@
 
 	spin_lock_irqsave(&sdos->lock, flags);
 	if (--sd->lockcount == 0 && sd->client_intr_enabled) {
+#ifdef BCMSPI_ANDROID
+		bcmsdh_oob_intr_set(1);
+#else
 		spi_devintr_on(sd);
+#endif /* BCMSPI_ANDROID */
 	}
 	spin_unlock_irqrestore(&sdos->lock, flags);
 }
 
+#ifndef BCMSPI_ANDROID
 void spi_waitbits(sdioh_info_t *sd, bool yield)
 {
 #ifndef BCMSDYIELD
 	ASSERT(!yield);
-#endif
+#endif // endif
 	sd_trace(("%s: yield %d canblock %d\n",
 	          __FUNCTION__, yield, BLOCKABLE()));
 
@@ -251,3 +575,84 @@
 	}
 
 }
+#else /* !BCMSPI_ANDROID */
+int bcmgspi_dump = 0;		/* Set to dump complete trace of all SPI bus transactions */
+
+static void
+hexdump(char *pfx, unsigned char *msg, int msglen)
+{
+	int i, col;
+	char buf[80];
+
+	ASSERT(strlen(pfx) + 49 <= sizeof(buf));
+
+	col = 0;
+
+	for (i = 0; i < msglen; i++, col++) {
+		if (col % 16 == 0)
+			strcpy(buf, pfx);
+		sprintf(buf + strlen(buf), "%02x", msg[i]);
+		if ((col + 1) % 16 == 0)
+			printf("%s\n", buf);
+		else
+			sprintf(buf + strlen(buf), " ");
+	}
+
+	if (col % 16 != 0)
+		printf("%s\n", buf);
+}
+
+/* Send/Receive an SPI Packet */
+void
+spi_sendrecv(sdioh_info_t *sd, uint8 *msg_out, uint8 *msg_in, int msglen)
+{
+	int write = 0;
+	int tx_len = 0;
+	struct spi_message msg;
+	struct spi_transfer t[2];
+
+	spi_message_init(&msg);
+	memset(t, 0, 2*sizeof(struct spi_transfer));
+
+	if (sd->wordlen == 2)
+#if !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW))
+		write = msg_out[2] & 0x80;
+#else
+		write = msg_out[1] & 0x80;
+#endif /* !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW)) */
+	if (sd->wordlen == 4)
+#if !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW))
+		write = msg_out[0] & 0x80;
+#else
+		write = msg_out[3] & 0x80;
+#endif /* !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW)) */
+
+	if (bcmgspi_dump) {
+		hexdump(" OUT: ", msg_out, msglen);
+	}
+
+	tx_len = write ? msglen-4 : 4;
+
+	sd_trace(("spi_sendrecv: %s, wordlen %d, cmd : 0x%02x 0x%02x 0x%02x 0x%02x\n",
+		write ? "WR" : "RD", sd->wordlen,
+		msg_out[0], msg_out[1], msg_out[2], msg_out[3]));
+
+	t[0].tx_buf = (char *)&msg_out[0];
+	t[0].rx_buf = 0;
+	t[0].len = tx_len;
+
+	spi_message_add_tail(&t[0], &msg);
+
+	t[1].rx_buf = (char *)&msg_in[tx_len];
+	t[1].tx_buf = 0;
+	t[1].len = msglen-tx_len;
+
+	spi_message_add_tail(&t[1], &msg);
+	spi_sync(gBCMSPI, &msg);
+
+	if (bcmgspi_dump) {
+		hexdump(" IN  : ", msg_in, msglen);
+	}
+}
+#endif /* !BCMSPI_ANDROID */
+#endif /* !GSPIBCM */

--
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